Glossary

Glossary of evolutionary psychology

Short definitions for terms used throughout the encyclopedia. Each term links to a full article when one exists.

Adaptation: An adaptation is a trait that has evolved through natural selection because it enhanced the survival and reproduction of its bearers in a particular environment.See full article →
Adaptationism and its critics: Adaptationism is the research program in evolutionary biology and psychology that seeks to explain traits as adaptations, products of natural selection designed to solve specific problems in an organism's ancestral environment.See full article →
Adaptationist Accounts of Religion: Adaptationist accounts of religion propose that religious beliefs and practices, or the psychological mechanisms that give rise to them, are adaptations that evolved due to their fitness benefits for individuals or groups.See full article →
Adaptive Lag: Adaptive lag refers to the phenomenon where a species' evolved adaptations, shaped by past environments, become mismatched with novel or rapidly changing current environments.See full article →
Adaptive vs. Maladaptive Responses to Disease: This entry differentiates between adaptive and maladaptive responses to disease within an evolutionary framework, examining how certain physiological and behavioral reactions to pathogens and injury, while often uncomfortable or detrimental in modern contexts, may have conferred…See full article →
Adolescence in Evolutionary Perspective: Adolescence, a distinct life stage characterized by rapid physical, cognitive, and social changes, is a relatively recent phenomenon in human evolutionary history, emerging as a prolonged period between childhood and adulthood.See full article →
Adoption Studies: Adoption studies are a research methodology used to disentangle the relative contributions of genetic and environmental factors to phenotypic traits and behaviors.See full article →
Adult Attachment: Adult attachment theory extends Bowlby's original work on infant-caregiver bonds to romantic relationships and other close adult relationships, positing that early relational experiences shape internal working models that influence adult relational patterns.See full article →
Aesthetic preferences as adaptations: Aesthetic preferences, the inclinations to find certain stimuli beautiful or pleasing, are theorized by evolutionary psychologists to be adaptations that guided ancestral organisms toward beneficial environments, mates, and resources, and away from detrimental ones.See full article →
Affect Program Theory: Affect program theory posits that certain fundamental emotions are innate, universally recognized, and associated with distinct, pre-wired physiological and behavioral responses, or "programs." This theory is foundational to understanding the evolutionary origins and…See full article →
Afterlife Beliefs: Afterlife beliefs refer to the conviction that some aspect of an individual's consciousness or identity persists beyond physical death. Evolutionary psychology investigates the cognitive mechanisms and social functions that may have contributed to the widespread prevalence and…See full article →
Age at First Reproduction: Age at first reproduction (AFR) is a fundamental life history trait reflecting the timing of an organism's transition from juvenile to reproductive states.See full article →
Aggression: Aggression, in evolutionary psychology, refers to behaviors intended to inflict harm or damage on another individual, often arising from conflicts over resources, status, or mates.See full article →
Aggression in Girls and Women: Aggression in girls and women, while often less physically overt than in males, encompasses a range of behaviors including relational aggression, and is understood through evolutionary frameworks that consider sex-specific reproductive challenges and social strategies.See full article →
Alfred Russel Wallace: Alfred Russel Wallace was a British naturalist, explorer, geographer, anthropologist, and biologist, best known for independently conceiving the theory of evolution by natural selection.See full article →
Allergy as Evolved Response: Allergies, characterized by exaggerated immune responses to otherwise harmless substances, are increasingly viewed through an evolutionary lens, with theories proposing they represent adaptive mechanisms that have become dysregulated in modern environments.See full article →
Allomothering: Allomothering refers to the care of offspring by individuals other than the biological mother, a widespread phenomenon across many species, particularly among humans and other cooperatively breeding primates.See full article →
Alloparenting: Alloparenting refers to any form of parental care provided by individuals other than a biological parent, a widespread phenomenon across many species, including humans.See full article →
Altruism (Evolutionary): Evolutionary altruism refers to behavior that benefits another individual at a cost to the actor's own fitness, presenting a fundamental challenge to natural selection theory, which typically favors traits that enhance an individual's survival and reproduction.See full article →
Altruistic Punishment: Altruistic punishment refers to the act of incurring a personal cost to punish a defector or norm-violator, even when there is no direct personal benefit from the punishment itself.See full article →
Analytical Rumination Hypothesis: The Analytical Rumination Hypothesis proposes that depression, or at least some forms of it, represents an evolved, adaptive response characterized by intense, focused, and prolonged thought aimed at analyzing and resolving complex social problems.See full article →
Anger in Evolutionary Perspective: Anger is an evolved emotional state characterized by feelings of antagonism toward someone or something perceived to have done wrong, often accompanied by physiological arousal and behavioral readiness for confrontation.See full article →
Animal Models in Evolutionary Psychology: Animal models in evolutionary psychology involve studying non-human species to gain insights into the evolutionary origins, functions, and mechanisms of human behavior and cognition.See full article →
Animal Play: Animal play refers to a diverse set of motor activities that appear purposeless, are intrinsically rewarding, and are performed repeatedly, often in exaggerated or incomplete forms, across a wide range of species.See full article →
Anisogamy: Anisogamy refers to the fundamental difference in size and number between male and female gametes, with females producing fewer, larger, and energetically costlier ova, and males producing many small, motile, and energetically cheaper sperm.See full article →
Anne Fausto-Sterling's Critique: Anne Fausto-Sterling is a prominent biologist and gender theorist whose work critically examines the biological determinism often associated with evolutionary explanations of sex and gender, advocating for a more nuanced understanding of their development through complex…See full article →
Antibiotic Resistance Evolution: Antibiotic resistance evolution describes the process by which bacteria develop the ability to survive exposure to antibiotics, a phenomenon driven by natural selection acting on genetic variation within microbial populations.See full article →
Anxiety in Evolutionary Perspective: Anxiety, a complex emotional state characterized by apprehension, worry, and physiological arousal, is understood in evolutionary psychology as a adaptive mechanism designed to detect and respond to potential threats, thereby promoting survival and reproduction.See full article →
Approximate Number System: The Approximate Number System (ANS) refers to an innate, non-symbolic cognitive system that allows humans and many other animals to estimate and compare quantities without counting.See full article →
Assortative Mating: Assortative mating refers to a non-random mating pattern where individuals with similar phenotypes or genotypes mate with one another more frequently than would be expected under a random mating pattern.See full article →
Attachment in Infants and Children: Attachment refers to the deep and enduring emotional bond that connects one person to another across time and space, particularly the bond formed between an infant and a primary caregiver.See full article →
Audio Service Test Fixture: Fixture article for audioService.test.
Autobiographical Memory: Autobiographical memory refers to a complex system of memories for personal experiences that form an individual's life story, integrating episodic and semantic information.See full article →
Autoimmune Disease in Evolutionary Perspective: Autoimmune diseases, conditions where the immune system mistakenly attacks the body's own tissues, present a paradox from an evolutionary standpoint, as they reduce fitness.See full article →
Awe: Awe is a complex emotional experience characterized by feelings of vastness and a need for accommodation, often triggered by stimuli that transcend typical frames of reference.See full article →
Barbara Smuts: Barbara Smuts is a prominent primatologist and evolutionary anthropologist known for her extensive fieldwork on baboons and her theoretical contributions to understanding female social strategies, male-female relationships, and the evolution of friendship and cooperation across…See full article →
Basic Emotions: The concept of basic emotions posits that certain emotions are fundamental, biologically distinct, and universally expressed and recognized across human cultures.See full article →
Bateman's Principle: Bateman's principle describes a fundamental asymmetry in sexual selection, positing that males generally experience greater variance in reproductive success and a stronger correlation between mating success and reproductive success than females.See full article →
Behavior Genetics Critiques: Critiques of behavior genetics address methodological and conceptual challenges in attributing variation in complex traits to genetic and environmental factors.See full article →
Behavioral Ecology: Behavioral ecology is a field that examines the evolutionary basis for animal behavior due to ecological pressures. It seeks to understand how natural selection shapes behavioral traits to maximize an organism's fitness in its specific environment.See full article →
Behavioral genetics: Behavioral genetics is a field that investigates the relative contributions of genetic and environmental factors to individual differences in behavior and psychological traits.See full article →
Behavioral Immune System: The behavioral immune system refers to a suite of psychological mechanisms that detect cues of pathogen presence in the environment and motivate behavioral responses aimed at avoiding infection.See full article →
Big Gods Hypothesis: The Big Gods hypothesis proposes that belief in powerful, morally concerned, and omniscient deities evolved as a mechanism to foster large-scale cooperation and prosociality among genetically unrelated individuals, thereby facilitating the emergence and stability of complex…See full article →
Big Mistake Hypothesis: The Big Mistake Hypothesis proposes that human cooperative behaviors observed in modern, large-scale, anonymous interactions, particularly in experimental settings, are maladaptive byproducts of psychological mechanisms that evolved to promote cooperation in small-scale,…See full article →
Biological Essentialism: Biological essentialism is the belief that certain attributes, behaviors, or capacities of individuals or groups are determined by their innate biological nature, rather than by environmental, social, or cultural factors.See full article →
Birth Order and Personality: The hypothesis that an individual's birth order within their family systematically influences their personality traits has been a recurring theme in psychology, notably popularized by Alfred Adler and later extensively developed by Frank Sulloway.See full article →
Body Symmetry and Attractiveness: Body symmetry, particularly fluctuating asymmetry (FA), is a widely studied cue in evolutionary psychology, hypothesized to signal genetic quality, developmental stability, and health.See full article →
Born-Believers Hypothesis: The born-believers hypothesis posits that humans possess innate cognitive biases and mechanisms that predispose them to religious belief, rather than religion being solely a product of cultural learning.See full article →
Buller, David: David Buller is a philosopher of science known for his extensive critiques of specific methodologies and claims within evolutionary psychology, particularly those related to the modularity of mind and the universality of human nature.See full article →
Buller, David: David Buller is a philosopher of science known for his influential critiques of certain foundational assumptions and methodologies within evolutionary psychology, particularly as presented in the 'Santa Barbara school' tradition.See full article →
Buller's Adapting Minds: David Buller's 2005 book, *Adapting Minds: Evolutionary Psychology and the Persistent Allure of Genetic Determinism*, presented a comprehensive philosophical critique of what he termed the 'Standard Model' of evolutionary psychology, particularly as articulated by Tooby and…See full article →
Bullying in Evolutionary Perspective: Bullying, defined as repeated aggressive behavior intended to harm another, is examined through an evolutionary lens as a potentially adaptive strategy for resource acquisition, status enhancement, and dominance assertion within social hierarchies.See full article →
Buss, David: David Buss is a prominent figure in evolutionary psychology, widely recognized for his pioneering research on human mating strategies, sex differences in mate preferences, and the evolutionary origins of emotions like jealousy.See full article →
By-product Accounts of Religion: By-product accounts of religion propose that religious beliefs and practices are not direct adaptations for specific functions but rather emergent consequences of cognitive mechanisms that evolved for other, non-religious purposes.See full article →
By-product Hypotheses: By-product hypotheses propose that certain psychological traits or behaviors are not direct adaptations shaped by natural selection for their current function, but rather arise as incidental side effects of other adaptive processes.See full article →
Cancer in Evolutionary Perspective: Cancer, a disease characterized by uncontrolled cell growth, is a fundamental challenge to multicellularity, arising from somatic evolution within an organism.See full article →
Charles Darwin: Charles Darwin (1809–1882) was an English naturalist whose theory of evolution by natural selection provided a unifying framework for understanding the diversity and adaptation of life, including human psychology.See full article →
Cheater Detection: Cheater detection refers to a hypothesized specialized cognitive mechanism that evolved to identify individuals who violate social contracts, particularly in situations involving reciprocal altruism.See full article →
Childhood as a Life-History Stage: Childhood, in an evolutionary context, refers to a distinct period of human development characterized by prolonged immaturity, dependence on caregivers, and intensive learning, which contrasts sharply with the shorter developmental periods observed in other primates.See full article →
Chimpanzee Warfare: Chimpanzee warfare refers to the organized, lethal aggression observed between groups of chimpanzees, primarily involving territorial incursions, raids, and the killing of rival individuals.See full article →
Cladistics: Cladistics is a method of biological classification that groups organisms strictly by shared derived characteristics (synapomorphies), aiming to reconstruct their evolutionary history and relationships.See full article →
Coalition Formation: Coalition formation refers to the process by which two or more individuals cooperate to achieve a common goal that they could not accomplish, or could accomplish less efficiently, alone.See full article →
Coalitional Aggression: Coalitional aggression refers to coordinated violence perpetrated by groups against other groups or individuals, a phenomenon observed across various species, including humans and chimpanzees.See full article →
Coalitional Psychology: Coalitional psychology examines the evolved cognitive mechanisms that underpin human group formation, intergroup conflict, and cooperation within groups.See full article →
Coevolution of Pathogens and Hosts: The coevolution of pathogens and hosts describes the reciprocal evolutionary changes occurring in two interacting species, where adaptations in one species drive counter-adaptations in the other.See full article →
Cognitive Adaptations: Cognitive adaptations are specialized mental mechanisms or information-processing systems that evolved through natural selection to solve recurrent adaptive problems faced by our ancestors.See full article →
Cognitive Load and the Social Brain: Cognitive load refers to the total amount of mental effort being used in working memory, and its interaction with the social brain explores how the processing demands of social information influence cognitive resources and, conversely, how cognitive limitations shape social…See full article →
Cognitive Specialization: Cognitive specialization refers to the evolutionary process by which distinct cognitive mechanisms or modules develop to solve specific adaptive problems, rather than relying on general-purpose cognitive abilities.See full article →
Cognitive Swiss army knife: The "cognitive Swiss army knife" is a metaphor used to describe the view that the human mind is composed of numerous domain-specific, evolved psychological mechanisms, each designed to solve a particular adaptive problem.See full article →
Color Terms Across Cultures: The study of color terms across cultures investigates how different languages categorize and name the continuous spectrum of visible light, revealing insights into the interplay between universal human perception, cognitive architecture, and cultural influence.See full article →
Comparative Cognition: Comparative cognition is the study of cognitive processes across different species, aiming to understand the evolutionary history, adaptive functions, and underlying mechanisms of mental abilities.See full article →
Comparative Psychology: Comparative psychology is the scientific study of animal behavior and mental processes, seeking to understand the evolutionary history and functional significance of psychological traits across species.See full article →
Concealed Ovulation: Concealed ovulation refers to the absence of overt, reliable signals of female fertility to males, a trait characteristic of human females. This phenomenon is a central puzzle in evolutionary psychology, prompting various hypotheses regarding its adaptive function and…See full article →
Conceptual Analysis in Evolutionary Psychology: Conceptual analysis in evolutionary psychology involves the rigorous examination and clarification of fundamental concepts, theories, and empirical claims to ensure logical coherence, definitional precision, and consistency with established scientific principles.See full article →
Conformist Transmission: Conformist transmission describes a specific type of social learning where individuals are disproportionately likely to adopt cultural traits or behaviors that are already common in their population.See full article →
Content Bias in Cultural Transmission: Content bias refers to the differential adoption and retention of cultural traits based on their inherent characteristics or meaning, independent of the source or context of transmission.See full article →
Continuity vs. Discontinuity in Cognitive Evolution: The debate over continuity versus discontinuity in cognitive evolution concerns whether human cognitive abilities arose gradually from ancestral primate capacities or emerged through distinct, qualitative shifts.See full article →
Convergent Evolution as Evidence: Convergent evolution refers to the independent evolution of similar traits or adaptations in different lineages, often in response to similar environmental pressures.See full article →
Cooking Hypothesis: The Cooking Hypothesis posits that the controlled use of fire for cooking food was a pivotal evolutionary innovation, driving significant changes in human biology, morphology, and cognitive development.See full article →
Coolidge effect: The Coolidge effect describes the phenomenon observed in many mammalian species where males, and to a lesser extent females, exhibit renewed sexual interest and copulatory vigor when presented with novel receptive partners, even after having become sated or exhausted with a…See full article →
Cooperation (Evolutionary): Evolutionary cooperation refers to behaviors where an individual incurs a cost to provide a benefit to another, a phenomenon that appears paradoxical from a gene-centric view of natural selection.See full article →
Cooperation among Kin: Cooperation among kin refers to the phenomenon where individuals provide benefits to genetic relatives, often at a cost to themselves. This behavior is central to the theory of kin selection, which explains how altruism can evolve when the benefits to relatives, weighted by…See full article →
Cooperation Among Non-Kin: Cooperation among non-kin refers to behaviors where individuals provide benefits to unrelated others, often at a cost to themselves. This phenomenon poses a significant challenge to classical evolutionary theory, which emphasizes individual fitness maximization, and has led to…See full article →
Cooperation at Scale: Cooperation at scale refers to the human capacity for large-group cooperation, extending beyond kin and reciprocal dyads, which is a distinctive feature of human societies. This phenomenon is central to understanding the evolution of complex social structures and institutions.See full article →
Cooperative Basis of Language: The cooperative basis of language refers to the hypothesis that human language, unlike animal communication systems, fundamentally relies on a foundation of shared intentionality and prosocial motivations.See full article →
Cooperative Breeding: Cooperative breeding describes a social system where individuals other than the genetic parents assist in the care and rearing of offspring, a phenomenon with significant implications for understanding the evolution of altruism, social complexity, and human life history.See full article →
Cooperative Communication: Cooperative communication refers to the exchange of information between individuals that benefits both the sender and the receiver, or at least does not impose a net cost on the sender while benefiting the receiver.See full article →
Cooperative-breeding hypothesis of human life history: The cooperative-breeding hypothesis posits that the unique human life history pattern, characterized by extended childhood, shortened interbirth intervals, and post-reproductive longevity, evolved as an adaptation to the provisioning of offspring by individuals other than the…See full article →
Cordelia Fine: Cordelia Fine is a prominent critic of evolutionary psychological explanations of sex differences, particularly those pertaining to cognitive abilities and behavior.See full article →
Cordelia Fine on Sex Differences: Cordelia Fine is a prominent critic of what she terms "neurosexism" and "gender essentialism," arguing that many purported psychological sex differences are either exaggerated, poorly evidenced, or culturally constructed rather than biologically determined.See full article →
Cortisol, stress, and status: Cortisol is a glucocorticoid hormone released in response to stress, playing a crucial role in regulating energy metabolism and immune function.See full article →
Costly Punishment in Cooperation: Costly punishment refers to the act of imposing a penalty on a defector in a cooperative interaction, even when doing so incurs a personal cost to the punisher.See full article →
Costly Signaling Theory: Costly signaling theory proposes that individuals can honestly advertise their underlying quality or intentions to others through signals that are inherently expensive to produce or maintain.See full article →
Costly-Signaling Models of Cooperation: Costly-signaling models propose that individuals may engage in altruistic or cooperative behaviors that are inherently expensive to signal their underlying quality, such as health, wealth, or commitment, to potential mates or allies.See full article →
Costly-signaling theory of religion: The costly-signaling theory of religion proposes that religious behaviors, particularly those involving significant personal sacrifice or effort, function as honest signals of an individual's commitment to a group.See full article →
Cravings and Aversions in Pregnancy: Pregnancy cravings and aversions refer to strong desires for or avoidance of specific foods and odors during gestation, phenomena observed across diverse cultures.See full article →
Critical Periods: Critical periods are specific developmental windows during which an organism is maximally sensitive to certain environmental stimuli or experiences, leading to the irreversible acquisition of particular behaviors, skills, or neural structures.See full article →
Critiques of Evolutionary Psychology: Evolutionary psychology, like any scientific field, has faced substantial criticism regarding its theoretical foundations, methodological approaches, and specific empirical claims.See full article →
Critiques of the EEA Concept: The Environment of Evolutionary Adaptedness (EEA) is a foundational concept in evolutionary psychology, referring to the ancestral conditions that shaped human psychological adaptations.See full article →
Cross-cultural evidence in evolutionary psychology: Cross-cultural evidence is critical for distinguishing between universal human psychological adaptations and culturally variable behaviors, providing a robust empirical basis for evolutionary psychological hypotheses.See full article →
Cross-cultural linguistic universals: Cross-cultural linguistic universals refer to structural or functional properties found across all human languages, suggesting underlying cognitive architectures or shared evolutionary pressures.See full article →
Cross-cultural method: The cross-cultural method involves comparing psychological phenomena across diverse human societies to identify both universal patterns and culturally specific variations.See full article →
Cross-cultural variation in fairness: Cross-cultural research on fairness investigates how perceptions and behaviors related to equitable distribution and reciprocal exchange vary across different human societies, illuminating the interplay between evolved psychological mechanisms and cultural learning in shaping…See full article →
Cryptic Female Choice: Cryptic female choice refers to post-copulatory mechanisms by which females can bias paternity in favor of certain males, even after insemination has occurred.See full article →
Cultural Attractor Theory: Cultural attractor theory proposes that certain cultural variants are more likely to be adopted, retained, and transmitted across generations due to their inherent properties interacting with human cognitive biases and psychological predispositions.See full article →
Cultural Evolution: Cultural evolution refers to the cumulative, non-genetic transmission of information, behaviors, and technologies across generations or between individuals, often modeled using principles derived from biological evolution.See full article →
Cultural Group Selection: Cultural group selection refers to the idea that cultural traits or practices can evolve through a process analogous to natural selection, where groups possessing certain cultural attributes outcompete or out-reproduce other groups.See full article →
Cultural Transmission: Cultural transmission refers to the processes by which information, beliefs, attitudes, and behaviors are acquired from other members of a group, distinct from genetic inheritance.See full article →
Cumulative Cultural Ratchet: The cumulative cultural ratchet refers to the unique human capacity for cultural knowledge and innovations to accumulate and improve over generations, rather than being lost or reinvented.See full article →
Daly, Martin: Martin Daly (1944–2020) was a prominent evolutionary psychologist and behavioral ecologist known for his foundational work on the evolutionary analysis of human violence, particularly infanticide and homicide, often in collaboration with Margo Wilson.See full article →
Darwinian Medicine: Darwinian medicine, also known as evolutionary medicine, applies evolutionary principles to understand and address health and disease. It seeks to explain why organisms are susceptible to illness, rather than solely focusing on proximate mechanisms of disease.See full article →
David Buss: David Buss is a prominent figure in evolutionary psychology, best known for his extensive research on human mating strategies, sex differences in mate preferences, and the evolutionary origins of emotions such as jealousy.See full article →
David Sloan Wilson: David Sloan Wilson is an evolutionary biologist known for his advocacy of multilevel selection theory and its application to understanding human behavior, culture, and prosociality.See full article →
Defensive Killing: Defensive killing refers to acts of lethal aggression committed by an individual or group primarily to protect themselves, their kin, or their resources from immediate and severe threat.See full article →
Demonic-Males Hypothesis: The demonic-males hypothesis proposes that male-on-male aggression, particularly lethal coalitionary aggression, has been a significant selective pressure throughout human evolutionary history, shaping various aspects of male psychology and social organization.See full article →
Depression as Defense: The 'depression as defense' hypothesis proposes that depressive symptoms, rather than being purely maladaptive, may serve adaptive functions in response to specific environmental challenges.See full article →
Dictator Game: The Dictator Game is an experimental economics paradigm used to measure altruism and fairness preferences, where one participant (the Dictator) decides how to divide a sum of money with another participant (the Recipient), who has no power to influence the outcome.See full article →
Direct Reciprocity: Direct reciprocity describes a mechanism for the evolution of cooperation where individuals exchange benefits over time, contingent on past interactions. It is a fundamental concept in evolutionary psychology for explaining altruistic behaviors among non-kin.See full article →
Disgust as a Cognitive System: Disgust is a fundamental human emotion characterized by a strong aversion to certain stimuli, primarily those perceived as contaminants or threats to health, and is understood in evolutionary psychology as a specialized cognitive system designed to protect the organism from…See full article →
Disposable-soma theory: The disposable-soma theory posits that organisms face an evolutionary trade-off between investing resources in somatic maintenance and repair, which extends lifespan, versus reproduction, which maximizes fitness.See full article →
Domain Specificity: Domain specificity refers to the hypothesis that the human mind is composed of numerous specialized cognitive mechanisms, or modules, each designed to solve particular adaptive problems that arose repeatedly in ancestral environments.See full article →
Domain-Specific Reasoning: Domain-specific reasoning refers to cognitive mechanisms or modules that are specialized to solve particular adaptive problems, operating on specific types of information rather than general-purpose algorithms.See full article →
Dominance Hierarchies: Dominance hierarchies are structured patterns of social interaction in which individuals within a group consistently defer to or submit to others, forming a ranked order of access to resources and mating opportunities.See full article →
Dual Inheritance Theory: Dual inheritance theory, also known as gene-culture coevolution, proposes that human behavior is a product of two interacting evolutionary processes: genetic evolution and cultural evolution.See full article →
Edward O. Wilson: Edward O. Wilson (1929–2021) was an American biologist, naturalist, and writer, widely recognized as the founder of sociobiology, a discipline that applies evolutionary principles to explain social behavior in animals and humans.See full article →
Effect-size conventions in evolutionary psychology: Effect sizes quantify the magnitude of an observed phenomenon or relationship, providing a standardized measure independent of sample size. In evolutionary psychology, the interpretation and reporting of effect sizes are crucial for evaluating the biological significance and…See full article →
Elisabeth Lloyd: Elisabeth Lloyd is a philosopher of science known for her critical analyses of evolutionary explanations of sex and gender, particularly her influential work examining the "orgasm gap" and the adaptive significance of the female orgasm.See full article →
Embarrassment: Embarrassment is a self-conscious emotion typically experienced in response to social transgressions, blunders, or unwanted exposure, and is understood in evolutionary psychology as serving a crucial function in maintaining social standing and facilitating reconciliation within…See full article →
Emotion as Adaptation: The view that emotions are evolved psychological adaptations that serve specific functions in response to recurrent challenges in an organism's ancestral environment.See full article →
Emotion in Evolutionary Perspective: Emotions are theorized to be evolved psychological adaptations that coordinate physiological, cognitive, and behavioral responses to recurring environmental challenges and opportunities, thereby enhancing an organism's fitness.See full article →
Encephalization: Encephalization refers to the evolutionary increase in the relative size of the brain compared to body size, a prominent feature of human evolution.See full article →
Environment of Evolutionary Adaptedness: The Environment of Evolutionary Adaptedness (EEA) refers to the specific selection pressures and ecological context that shaped a particular adaptation, often invoked to understand the functional design of human psychological mechanisms.See full article →
Episodic Memory: Episodic memory is a system for remembering specific past events, including their context and the subjective experience of re-living them. In evolutionary psychology, its development and adaptive functions are explored, particularly in relation to future planning, social…See full article →
Ethology: Ethology is the scientific study of animal behavior, particularly in natural environments, focusing on the evolutionary origins and adaptive functions of behavioral patterns.See full article →
Eusociality: Eusociality is the highest level of social organization in animals, characterized by cooperative brood care, overlapping generations within a colony, and a reproductive division of labor where some individuals forgo reproduction to aid the reproductive efforts of others.See full article →
Evolution of Cooperation: The evolution of cooperation addresses the puzzle of how altruistic behaviors, which seemingly reduce an individual's fitness, could persist and spread through natural selection.See full article →
Evolution of Human Diet: The evolution of the human diet is a central topic in evolutionary psychology, examining how dietary shifts influenced hominin brain development, social structures, and physiological adaptations.See full article →
Evolution of REM Sleep: Rapid Eye Movement (REM) sleep is a distinct and paradoxical sleep stage characterized by high brain activity, muscle atonia, and vivid dreaming, found across a wide range of mammals and birds.See full article →
Evolution of Social Norms: Social norms are unwritten rules of behavior that are widely accepted and enforced within a group, guiding individual actions and promoting social order.See full article →
Evolutionarily Stable Strategy: An Evolutionarily Stable Strategy (ESS) is a strategy that, if adopted by a population, cannot be invaded by any alternative strategy. This concept, developed by John Maynard Smith and George R.See full article →
Evolutionary Accounts of Morality: Evolutionary accounts of morality explore the origins and functions of human moral systems from a biological perspective, positing that moral behaviors and sentiments are products of natural selection and other evolutionary processes.See full article →
Evolutionary Anthropology: Evolutionary anthropology is a scientific discipline that applies the principles of evolutionary theory, particularly natural selection, to the study of human biology, behavior, and culture.See full article →
Evolutionary Developmental Psychology: Evolutionary Developmental Psychology (EDP) is a research paradigm that applies the principles of evolutionary biology to understand the origins and development of human psychological mechanisms across the lifespan.See full article →
Evolutionary Explanations of Religion: Evolutionary explanations of religion seek to understand the origins, persistence, and universal features of religious belief and practice through the lens of natural and sexual selection.See full article →
Evolutionary Medicine: Evolutionary medicine, also known as Darwinian medicine, applies the principles of evolutionary biology to understand and address health and disease.See full article →
Evolutionary Mismatch: Evolutionary mismatch describes a situation where an organism's evolved traits, which were adaptive in its ancestral environment, become maladaptive or suboptimal in a novel or rapidly changed modern environment.See full article →
Evolutionary psychology: Evolutionary psychology is an approach to the study of human cognition and behavior that applies principles of evolutionary biology to understand the design of the human mind.See full article →
Evolutionary Psychology and Gender: Evolutionary psychology examines sex differences in human psychology and behavior, proposing that many such differences are evolved adaptations to recurrent challenges faced by ancestral males and females.See full article →
Evolutionary psychology and political ideology: Evolutionary psychology offers frameworks for understanding the origins and persistence of human political ideologies, positing that fundamental psychological mechanisms shaped by natural selection influence individuals' political attitudes and behaviors.See full article →
Evolutionary Psychology of Homosexuality: The evolutionary psychology of homosexuality investigates the apparent paradox of same-sex sexual behavior and attraction from a Darwinian perspective, seeking to understand its persistence despite its non-reproductive nature.See full article →
Evolutionary Psychology of Rape: The evolutionary psychology of rape examines whether rape can be understood as an evolved adaptation, a facultative strategy, or a by-product of other evolved psychological mechanisms, generating significant debate regarding its origins and implications.See full article →
Evolutionary Theory of Senescence: The evolutionary theory of senescence explains why organisms age and eventually die, positing that natural selection's power declines with age, leading to the accumulation of deleterious mutations and trade-offs in resource allocation that favor early-life reproduction over…See full article →
Exaptation: Exaptation refers to a trait that evolved for one purpose but was later co-opted for a different function, or a trait that arose as a non-adaptive byproduct and was later recruited for a beneficial role.See full article →
Expensive-Tissue Hypothesis: The Expensive-Tissue Hypothesis proposes that the evolution of a large brain in hominins was energetically offset by a corresponding reduction in the size of other metabolically costly organs, particularly the gut.See full article →
Extended Sexuality in Humans: Extended sexuality in humans refers to the phenomenon of female sexual receptivity and activity occurring outside of narrow fertile windows, distinguishing human females from most other mammalian species.See full article →
Extra-Pair Copulation: Extra-pair copulation (EPC) refers to sexual activity between an individual and a partner outside of their primary social pair-bond, a widespread phenomenon across many socially monogamous species, including humans.See full article →
Facial Attractiveness Research: Facial attractiveness research investigates the features and cues that humans perceive as beautiful, exploring their evolutionary origins and adaptive functions in mate selection and social interactions.See full article →
Family Conflict: Family conflict, within an evolutionary framework, refers to the inherent disagreements and antagonisms that arise between genetically related individuals due to diverging fitness interests, despite their shared genetic material.See full article →
Father Absence and Pubertal Timing: The hypothesis of father absence and pubertal timing posits that girls exposed to father absence during childhood tend to experience earlier menarche, a phenomenon interpreted through the lens of evolutionary life history theory as an adaptive response to environmental cues…See full article →
Father Involvement in Evolutionary Perspective: Father involvement, defined as a father's direct and indirect contributions to offspring rearing, is a variable but significant aspect of human life history strategies, shaped by ecological pressures and parental investment trade-offs.See full article →
Fear of heights: Fear of heights, or acrophobia, is a common human experience ranging from cautious apprehension to debilitating phobia, and its evolutionary origins are frequently discussed as a prime example of an adaptive fear mechanism designed to prevent falls and injury.See full article →
Female Choice in Sexual Selection: Female choice, a fundamental mechanism of sexual selection, refers to the differential reproductive success of males due to female preferences for certain male traits.See full article →
Female Intrasexual Competition: Female intrasexual competition refers to the behavioral strategies and psychological mechanisms employed by females to outcompete other females for access to desirable mates, resources, or social status.See full article →
Feminist Critiques of Evolutionary Psychology: Feminist critiques of evolutionary psychology examine its theoretical assumptions, methodologies, and conclusions, particularly concerning sex differences and gender roles, often arguing for biases that reinforce traditional or essentialist views.See full article →
Fetal Origins of Adult Disease: The Fetal Origins of Adult Disease (FOAD) hypothesis, also known as the Barker hypothesis, posits that adverse environmental conditions during critical periods of fetal development can program the fetus for increased susceptibility to chronic diseases in adulthood.See full article →
Fever as Defense: Fever, an elevated body temperature, is a highly conserved physiological response to infection and inflammation, widely understood in evolutionary medicine as an adaptive defense mechanism that enhances host immunity and inhibits pathogen growth.See full article →
Fiction and Theory of Mind: The relationship between engaging with fictional narratives and the development or exercise of theory of mind (ToM) is a significant area of inquiry in evolutionary psychology.See full article →
Field Experiments on Cooperation: Field experiments on cooperation investigate prosocial behaviors in naturalistic settings, offering ecological validity that complements laboratory studies.See full article →
Fluctuating Asymmetry as a Fitness Cue: Fluctuating asymmetry (FA) refers to small, random deviations from perfect bilateral symmetry in morphological traits, which are thought to reflect an individual's developmental stability and genetic quality.See full article →
Flynn Effect: The Flynn effect refers to the substantial and sustained increase in scores on standardized intelligence tests observed around the world from approximately the 1930s until the early 21st century.See full article →
Folk Biology: Folk biology refers to the intuitive, universal human understanding of the biological world, including the classification of living things, their growth, inheritance, and ecological relationships.See full article →
Folk Physics: Folk physics refers to the intuitive, often implicit understanding that humans possess regarding the behavior of physical objects and forces in the world.See full article →
Folk Psychology: Folk psychology refers to the human capacity to explain and predict the behavior of others by attributing to them mental states such as beliefs, desires, intentions, and emotions.See full article →
Folk Taxonomy: Folk taxonomy refers to the universal human tendency to classify and name natural objects, particularly living things, into hierarchical categories based on perceived similarities and differences.See full article →
Food Sharing in Foragers: Food sharing, the non-familial distribution of acquired resources, is a distinctive feature of human foraging societies, playing a crucial role in human social organization and life history.See full article →
Forager Societies and the EEA: The Environment of Evolutionary Adaptedness (EEA) refers to the set of selective pressures that shaped human psychological and physiological adaptations, primarily understood through the study of ancestral forager societies.See full article →
Francis Galton: Francis Galton (1822–1911) was a Victorian polymath whose wide-ranging scientific contributions laid foundational groundwork for modern statistics, behavioral genetics, and the study of individual differences, profoundly influencing the development of evolutionary psychology.See full article →
Frans de Waal: Frans de Waal is a Dutch primatologist and ethologist renowned for his extensive research into the social intelligence and emotional lives of primates, challenging traditional views of human uniqueness and emphasizing the evolutionary roots of morality and cooperation.See full article →
Fraternal Birth Order Effect: The fraternal birth order effect (FBOE) refers to the empirical finding that the probability of a male being homosexual increases with the number of older biological brothers he has.See full article →
Free-Rider Problem: The free-rider problem describes the challenge in cooperative systems where individuals benefit from collective goods or efforts without contributing their fair share, thereby undermining the stability and evolution of cooperation.See full article →
Frequency-dependent selection: Frequency-dependent selection occurs when the fitness of a phenotype or genotype depends on its frequency relative to other phenotypes or genotypes in a given population.See full article →
Friendship in Evolutionary Perspective: Friendship, broadly defined as a non-kin, non-reproductive social bond characterized by positive affect and reciprocal altruism, presents a significant puzzle for evolutionary theory.See full article →
Function of Play: Play, a seemingly non-utilitarian behavior observed across many mammalian and avian species, is a complex phenomenon whose adaptive functions have been a subject of extensive evolutionary inquiry.See full article →
Functions of Fear: Fear is a fundamental evolved psychological mechanism designed to detect and respond to threats, promoting survival by orchestrating a suite of physiological, cognitive, and behavioral changes.See full article →
Game Theory in Evolution: Game theory provides a mathematical framework for analyzing strategic interactions between rational agents, and its application to evolutionary biology has been instrumental in understanding the evolution of behaviors where the fitness outcome for an individual depends on the…See full article →
Gene-culture coevolution: Gene-culture coevolution describes the dynamic interplay between genetic and cultural evolution, where changes in one system influence the other, leading to reciprocal selective pressures and adaptations.See full article →
Gene-Environment Correlations: Gene-environment correlation (rGE) refers to situations where an individual's genetic predispositions are systematically associated with the environments they encounter, rather than being independent.See full article →
Generalizability of Evolutionary-Psychology Findings: The generalizability of evolutionary-psychology findings refers to the extent to which observations and conclusions drawn from specific populations or contexts can be applied universally across human groups, cultures, and historical periods.See full article →
Genetic Drift: Genetic drift is a mechanism of evolution characterized by random fluctuations in the frequencies of gene variants (alleles) within a population, independent of natural selection.See full article →
Genetic Fallacy: The genetic fallacy is a logical error that occurs when an argument's validity or truth is judged based on its origin, history, or source, rather than on the merits of the argument itself.See full article →
Genome-wide association studies of behavior: Genome-wide association studies (GWAS) examine the entire genome to identify genetic variants, typically single nucleotide polymorphisms (SNPs), that are statistically associated with particular traits or diseases, including complex human behaviors.See full article →
George C. Williams: George C. Williams (1926–2010) was an American evolutionary biologist whose rigorous theoretical contributions significantly shaped modern evolutionary thought, particularly through his critique of group selection and his elucidation of the gene as the primary unit of selection.See full article →
Gesture-First Hypothesis: The gesture-first hypothesis proposes that human language evolved from a system of manual and bodily gestures before the emergence of spoken language.See full article →
Good-genes hypothesis: The good-genes hypothesis proposes that individuals choose mates based on traits that reliably signal genetic quality, thereby increasing the fitness of their offspring.See full article →
Gowaty, Patricia: Patricia Adair Gowaty is an evolutionary biologist known for her influential work challenging traditional assumptions about female promiscuity, sexual selection, and the role of female agency in reproductive strategies across species.See full article →
Gowaty, Patricia Adair: Patricia Adair Gowaty is an American evolutionary biologist known for her pioneering work on sexual conflict, female promiscuity, and the evolution of social behavior, challenging prevailing assumptions about sex roles and reproductive strategies in animal species.See full article →
Grandmother hypothesis: The grandmother hypothesis proposes that menopause, a unique feature of human females, evolved because post-reproductive women could increase their inclusive fitness by investing in their grandchildren, thereby enhancing their daughters' reproductive success and offspring…See full article →
Greenbeard effect: The greenbeard effect describes a theoretical mechanism for altruism where individuals recognize and preferentially direct altruistic acts towards others who share a specific, identifiable genetic marker, even if those individuals are not close kin.See full article →
Group Differences Research: Group differences research in evolutionary psychology investigates systematic variations in psychological traits and behaviors between human populations, often focusing on sex, age, or ancestral groups.See full article →
Group Identity: Group identity refers to an individual's sense of belonging to a particular social group and the emotional significance attached to that membership.See full article →
Group Selection: Group selection refers to the idea that natural selection can operate at the level of groups, favoring traits that benefit the group even if they are detrimental to individuals within it.See full article →
Guilt in Evolutionary Perspective: Guilt is a complex social emotion characterized by feelings of remorse, self-blame, and a desire for reparation, typically arising from the transgression of a moral norm or harm caused to another.See full article →
Hamilton, William D.: William D. Hamilton (1936–2000) was a British evolutionary biologist whose theoretical work profoundly reshaped the understanding of social behavior, altruism, and the gene's-eye view of evolution.See full article →
Hamilton's Rule: Hamilton's Rule is a foundational principle in evolutionary biology, providing a mathematical framework for understanding the evolution of altruistic behaviors among relatives.See full article →
Handicap Principle: The Handicap Principle proposes that reliable signals of quality or fitness must be costly to produce, such that only individuals with genuinely high quality can afford to display them.See full article →
Hawkes, Kristen: Kristen Hawkes is an American anthropologist renowned for her contributions to human behavioral ecology, particularly her development of the "Grandmother Hypothesis." Her research focuses on the evolutionary significance of prolonged human post-reproductive lifespans and the…See full article →
Hawkes, Kristen: Kristen Hawkes is an American evolutionary anthropologist known for her pioneering work on the grandmother hypothesis, which posits that post-menopausal women contribute significantly to the reproductive success of their kin by provisioning grandchildren, thus extending human…See full article →
Helena Cronin: Helena Cronin is a philosopher of science known for her work on the conceptual foundations and implications of Darwinian theory, particularly its application to understanding human behavior and the mind.See full article →
Herbert Spencer: Herbert Spencer was a prominent English philosopher and polymath of the Victorian era, best known for his comprehensive system of evolutionary philosophy and for coining the phrase "survival of the fittest." His work significantly influenced early evolutionary thought,…See full article →
Hereditarianism and its Critics: Hereditarianism is the view that individual or group differences in complex traits, particularly cognitive abilities and behavioral tendencies, are primarily determined by genetic inheritance.See full article →
Heritability: Heritability is a statistical concept that quantifies the proportion of phenotypic variation in a population that is attributable to genetic variation among individuals.See full article →
Heritability Estimates: Heritability estimates quantify the proportion of phenotypic variation in a population that is attributable to genetic variation. These statistics are fundamental to understanding the relative contributions of genes and environment to complex traits, yet they are frequently…See full article →
Heritability of Intelligence: Heritability of intelligence refers to the proportion of variance in intelligence test scores within a given population that can be attributed to genetic differences among individuals.See full article →
Hill, Kim: Kim Hill is a prominent evolutionary anthropologist known for his extensive fieldwork among foraging societies, particularly the Ache of Paraguay, and his contributions to understanding human life history, cooperative behavior, and the evolutionary ecology of human subsistence.See full article →
Hillard Kaplan: Hillard Kaplan is an American anthropologist known for his foundational contributions to evolutionary anthropology, particularly in the development of life history theory and the embodied capital theory.See full article →
Homicide and Evolution: The study of homicide from an evolutionary perspective examines how patterns of lethal violence might be understood as byproducts or maladaptations of evolved psychological mechanisms that, in other contexts, serve adaptive functions.See full article →
Honor Cultures: Honor cultures are social systems characterized by a strong emphasis on reputation, respect, and the readiness to respond aggressively to perceived insults or threats to one's standing.See full article →
Horizontal Cultural Transmission: Horizontal cultural transmission refers to the process by which cultural information, such as beliefs, behaviors, and technologies, is transmitted between individuals of the same generation within a population.See full article →
Human Behavioral Ecology: Human Behavioral Ecology (HBE) is a research paradigm that applies the principles of evolutionary biology and optimality theory to understand the diversity of human behavior and cultural practices.See full article →
Human Longevity: Human longevity, the extended lifespan characteristic of *Homo sapiens* compared to most other mammals, presents a significant puzzle for evolutionary theory, which generally predicts that selection pressure declines sharply after reproductive age.See full article →
Hunger and Satiety: Hunger and satiety are fundamental motivational states that regulate energy intake, driving organisms to seek and consume food when energy reserves are low and to cease eating when sufficient energy has been acquired.See full article →
Hunter-gatherer Hypothesis of Spatial Cognition: The hunter-gatherer hypothesis of spatial cognition proposes that human spatial abilities, particularly those related to navigation, evolved under the selective pressures of a hunter-gatherer lifestyle, leading to specialized cognitive adaptations for tasks such as foraging,…See full article →
Hunter-gatherer studies: Hunter-gatherer studies involve the ethnographic and archaeological investigation of societies that subsist primarily by foraging wild foods, providing crucial insights into human behavioral ecology and the ancestral environments that shaped human psychology.See full article →
Hygiene Hypothesis: The Hygiene Hypothesis proposes that reduced exposure to microorganisms, especially during early childhood, leads to a dysregulated immune system that is more prone to allergic diseases and autoimmune conditions.See full article →
Hymenoptera and Haplodiploidy: Hymenoptera, an order of insects including ants, bees, and wasps, exhibit a unique genetic system called haplodiploidy, where males develop from unfertilized eggs and are haploid, while females develop from fertilized eggs and are diploid.See full article →
Imagination and Planning: Imagination and planning refer to cognitive capacities that enable organisms to mentally simulate future events, consider alternative courses of action, and devise strategies to achieve goals.See full article →
Imitation in Evolutionary Perspective: Imitation, the copying of observed actions, is a fundamental mechanism for cultural transmission and social learning, playing a crucial role in the development of complex behaviors and the accumulation of knowledge across generations.See full article →
Imprinting: Imprinting is a rapid, critical-period learning process, primarily observed in precocial birds, where an animal forms a strong, often irreversible, attachment to the first moving object it encounters, typically its parent.See full article →
Inclusive Fitness: Inclusive fitness is a theoretical concept in evolutionary biology that expands the traditional understanding of fitness to include the reproductive success of an individual's relatives, weighted by their degree of relatedness.See full article →
Inclusive Fitness Applied to Humans: Inclusive fitness theory, developed by William Hamilton, extends the concept of fitness beyond an individual's direct reproductive success to include the reproductive success of genetic relatives, weighted by their degree of relatedness.See full article →
Indirect Aggression: Indirect aggression refers to a form of social manipulation where harm is inflicted upon a target without direct confrontation, often through covert means such as social exclusion, rumor spreading, or manipulation of social relationships.See full article →
Indirect Reciprocity: Indirect reciprocity is a mechanism for the evolution of cooperation where an individual's altruistic act towards one person is reciprocated by a third party, often based on the actor's reputation.See full article →
Infidelity: Infidelity, broadly defined as sexual or emotional involvement with a partner outside of an established romantic or marital relationship, is a pervasive phenomenon across human cultures that presents significant challenges to pair-bonding and reproductive strategies.See full article →
Inflammatory Response: The inflammatory response is a fundamental, evolutionarily ancient biological process by which the body's immune system detects and eliminates harmful stimuli, such as pathogens or damaged cells, and initiates tissue repair.See full article →
Ingroup-Outgroup Bias: Ingroup-outgroup bias refers to the pervasive human tendency to favor members of one's own group (the ingroup) over members of other groups (outgroups).See full article →
Intelligence in Evolutionary Perspective: Intelligence, broadly defined as the capacity for complex and flexible problem-solving, is a central topic in evolutionary psychology due to its hypothesized role in enhancing survival and reproduction across diverse ecological and social challenges.See full article →
Intergroup Conflict: Intergroup conflict refers to antagonistic interactions between two or more distinct social groups, ranging from competition over resources to lethal warfare.See full article →
Intersexual Selection: Intersexual selection, a component of sexual selection, describes the process by which individuals of one sex (typically females) choose mates from among individuals of the opposite sex.See full article →
Intrasexual Selection: Intrasexual selection refers to competition between members of the same sex for access to mates, leading to the evolution of traits that enhance success in such contests.See full article →
Is/Ought Distinction: The is/ought distinction, also known as Hume's Guillotine, posits a fundamental logical gap between descriptive statements about what *is* the case and prescriptive statements about what *ought* to be the case.See full article →
Jerome Barkow: Jerome Barkow is a Canadian anthropologist recognized for his foundational contributions to evolutionary psychology, particularly through his work in integrating anthropological perspectives with the emerging field.See full article →
John Maynard Smith: John Maynard Smith (1920–2004) was a British evolutionary biologist and geneticist whose work was foundational in applying mathematical and game-theoretic approaches to evolutionary problems, profoundly influencing the development of modern evolutionary theory, including…See full article →
John Tooby: John Tooby is a foundational figure in evolutionary psychology, best known for his collaborative work with Leda Cosmides in developing the theoretical and methodological framework for the field, emphasizing the concept of psychological adaptations and the modularity of the mind.See full article →
Joint Attention: Joint attention refers to the shared focus of two or more individuals on the same object or event, mediated by eye gaze, pointing, or other communicative gestures.See full article →
Jonathan Haidt: Jonathan Haidt is a prominent moral and political psychologist known for his work on the origins and functions of morality, particularly his Moral Foundations Theory.See full article →
Joseph Henrich: Joseph Henrich is a prominent anthropologist and economist known for his foundational work on gene-culture coevolution, the evolution of human cooperation, and the cognitive and psychological differences observed across diverse human populations, particularly highlighting the…See full article →
Just-So Stories: The term "just-so story" in evolutionary psychology refers to a common criticism alleging that some evolutionary explanations are unfalsifiable, post-hoc narratives constructed to explain observed phenomena without rigorous empirical testing.See full article →
Juvenility in Humans: Human juvenility is a distinct life history stage characterized by a prolonged period of slow growth, dependence on adults, and extensive learning, emerging between infancy and adolescence.See full article →
Karl von Frisch: Karl von Frisch (1886–1982) was an Austrian ethologist who pioneered the study of animal communication and sensory perception, most notably through his groundbreaking decipherment of the honey bee's waggle dance.See full article →
Kim Hill (anthropologist): Kim Hill is an American evolutionary anthropologist known for his extensive fieldwork among foraging societies, particularly the Ache of Paraguay, and for his contributions to life history theory, cooperative breeding, and the understanding of human foraging ecology.See full article →
Kin Selection: Kin selection is an evolutionary theory proposing that altruistic behaviors can evolve if they preferentially benefit genetic relatives, thereby increasing the likelihood that shared genes are passed to the next generation. This concept, formalized by William D.See full article →
Kin-selection hypothesis of homosexuality: The kin-selection hypothesis of homosexuality proposes that genes predisposing individuals to homosexual behavior can persist in a population if those individuals enhance the reproductive success of their relatives, thereby indirectly propagating shared genetic material.See full article →
Kinship Recognition: Kinship recognition refers to the evolved psychological mechanisms that enable organisms to identify and differentiate genetic relatives from non-relatives, influencing social behaviors such as altruism, mate choice, and conflict resolution.See full article →
Konrad Lorenz: Konrad Lorenz (1903–1989) was an Austrian zoologist and ethologist, widely recognized as one of the founders of ethology, the biological study of animal behavior.See full article →
Lactase Persistence: Lactase persistence refers to the continued expression of the lactase enzyme into adulthood, allowing individuals to digest lactose, the primary sugar in milk.See full article →
Language as Adaptation: The hypothesis that human language, with its complex syntax and semantics, is a biological adaptation shaped by natural selection for communication and cognitive processing.See full article →
Language Phylogenetics: Language phylogenetics is the application of methods from biological phylogenetics to reconstruct the evolutionary history and relationships among human languages.See full article →
Late Pleistocene Symbolic Culture: Late Pleistocene symbolic culture refers to the emergence and development of complex symbolic behaviors, such as art, ornamentation, ritual, and advanced cognitive capacities, during the Upper Paleolithic period, primarily associated with *Homo sapiens*.See full article →
Leda Cosmides: Leda Cosmides is a foundational figure in evolutionary psychology, best known for her pioneering work with John Tooby in establishing the theoretical framework of the field and for her empirical research on the modularity of the mind, particularly in the domain of social…See full article →
Lethal Raiding: Lethal raiding refers to organized, coordinated attacks by groups of individuals from one community against members of another, with the explicit intent to kill.See full article →
Life History Theory: Life History Theory (LHT) is a framework within evolutionary biology that examines how natural selection shapes the timing and allocation of energy towards key fitness-related activities throughout an organism's lifespan.See full article →
Linguistic Relativity: Linguistic relativity, also known as the Sapir-Whorf hypothesis, posits that the structure of a language influences or determines its speakers' worldview or cognition.See full article →
Love: Love, in evolutionary psychology, refers to a suite of evolved psychological mechanisms and motivational states that facilitate the formation and maintenance of crucial social bonds, particularly those essential for reproduction, offspring survival, and cooperative group living.See full article →
Machiavellian Intelligence: Machiavellian intelligence refers to the suite of cognitive abilities that evolved to navigate and exploit complex social relationships within a group, particularly through strategic deception, manipulation, and alliance formation.See full article →
Male Competition in Sexual Selection: Male competition in sexual selection refers to the evolutionary processes by which males vie for access to mates, a phenomenon driven by differential reproductive success.See full article →
Male-Male Aggression: Male-male aggression refers to competitive behaviors between individuals of the male sex, a phenomenon widely observed across species, including humans.See full article →
Markets and Prosociality: This entry explores the complex relationship between market interactions and prosocial behavior, examining how economic systems may both foster and inhibit cooperation, trust, and fairness from an evolutionary perspective.See full article →
Marlene Zuk: Marlene Zuk is an evolutionary biologist known for her research on sexual selection, particularly the role of parasites in shaping mate choice, and for her critical perspective on some prevailing narratives in evolutionary psychology.See full article →
Marriage Systems Across Cultures: Marriage systems, defined as socially sanctioned unions between individuals, exhibit remarkable diversity across human cultures yet also display recurrent patterns that evolutionary psychologists seek to explain through the lens of reproductive strategies and parental…See full article →
Martin Daly: Martin Daly (b. 1944) is a prominent evolutionary psychologist known for his foundational work in applying evolutionary theory to human behavior, particularly in the areas of violence, risk-taking, and family dynamics.See full article →
Massive Modularity Hypothesis: The massive modularity hypothesis proposes that the human mind is largely, if not entirely, composed of a great number of specialized, domain-specific computational devices, or modules, each designed by natural selection to solve a particular adaptive problem faced by our…See full article →
Mate Copying: Mate copying, also known as 'social learning in mate choice,' describes a phenomenon where an individual's preference for a potential mate is influenced by the mate choices of others.See full article →
Mate Guarding in Humans: Mate guarding refers to behaviors employed by individuals to prevent their reproductive partners from engaging in extra-pair copulations or to deter rivals from attempting to poach their partners.See full article →
Mate Poaching: Mate poaching refers to the act of attempting to attract an individual who is already in a romantic relationship, or succeeding in doing so. From an evolutionary perspective, it represents a complex strategy with potential fitness benefits and costs for both the poacher and the…See full article →
Mate Retention: Mate retention refers to the set of behaviors and psychological mechanisms evolved to maintain a mating bond and prevent a partner from defecting to an alternative mate.See full article →
Mate Value: Mate value refers to an individual's overall desirability as a reproductive partner, encompassing a suite of traits and resources that enhance reproductive success.See full article →
Meaning-making Mind: The concept of the meaning-making mind refers to the human cognitive propensity to construct coherent narratives, explanations, and interpretations of events, experiences, and the world.See full article →
Memes: Memes, as originally conceived by Richard Dawkins, are units of cultural information that replicate and evolve through a process analogous to biological natural selection.See full article →
Memory Systems and Adaptation: Memory systems are not unitary but comprise distinct, specialized mechanisms that evolved to solve recurrent adaptive problems faced by ancestral humans.See full article →
Menopause: Menopause, the permanent cessation of ovarian function and menstruation in human females, presents a unique evolutionary puzzle, as it appears to contradict the fundamental principle of natural selection favoring continued reproduction.See full article →
Menstrual Cycle and Behavior: The menstrual cycle, a recurring physiological process in human females, is theorized to influence various behavioral and cognitive patterns due to fluctuating hormone levels, with evolutionary psychology exploring how these changes might relate to adaptive strategies,…See full article →
Mental Disorders in Evolutionary Perspective: An evolutionary perspective on mental disorders seeks to understand why certain psychological conditions exist, persist, and manifest in human populations by examining them through the lens of natural selection and adaptation.See full article →
Mental Rotation: Mental rotation is the cognitive process of imagining an object rotating in three-dimensional space, a fundamental aspect of spatial cognition that has been extensively studied for its implications in understanding human intelligence, sex differences, and the neural substrates…See full article →
Mental Time Travel: Mental time travel (MTT) refers to the cognitive capacity to mentally project oneself into the past (episodic memory) or the future (episodic foresight), enabling individuals to re-experience past events or pre-experience future ones.See full article →
Meta-analysis in Evolutionary Psychology: Meta-analysis is a statistical technique that systematically combines the results of multiple independent studies to produce a single, more precise estimate of an effect size, thereby increasing statistical power and generalizability.See full article →
MHC and Mate Choice in Humans: The Major Histocompatibility Complex (MHC) is a gene region critical for immune function, and research in evolutionary psychology explores its potential role in human mate selection, particularly through olfactory cues.See full article →
Miller, Geoffrey: Geoffrey Miller is an evolutionary psychologist known for his work on sexual selection, particularly the role of costly signaling and intelligence in human mate choice.See full article →
Miller, Geoffrey: Geoffrey Miller is an American evolutionary psychologist known for his work on sexual selection, particularly the role of costly signaling and intelligence in human mate choice, and for applying evolutionary principles to consumer behavior and artificial intelligence.See full article →
Minimal-Group Paradigm: The minimal-group paradigm is an experimental method used to investigate the minimal conditions under which individuals show favoritism toward their own group and discrimination against an outgroup.See full article →
Mirror Neurons and Language: Mirror neurons are a class of visuomotor neurons that discharge both when an individual performs an action and when they observe another individual performing a similar action.See full article →
Mismatch in Health: Evolutionary mismatch refers to the phenomenon where traits or behaviors that were adaptive in an ancestral environment become maladaptive or detrimental in a novel, modern environment, leading to various health problems.See full article →
Modes of Religiosity: The Modes of Religiosity theory, primarily developed by Harvey Whitehouse, proposes that religious traditions and practices can be categorized into two fundamental cognitive and emotional modes: imagistic and doctrinal.See full article →
Modularity of Mind: The modularity of mind hypothesis proposes that the mind is composed of distinct, specialized computational units, or modules, each dedicated to solving specific problems.See full article →
Monogamy: Monogamy, broadly defined as an exclusive pair-bond, is a mating system characterized by a single mate for a reproductive period or lifetime. In evolutionary psychology, understanding the conditions under which monogamy evolves and persists, particularly in humans, is crucial…See full article →
Moral Disgust: Moral disgust refers to a specific emotional response characterized by revulsion and a desire for avoidance, triggered by violations of social norms or moral principles rather than by physical contaminants.See full article →
Moral Emotions: Moral emotions are a class of affective states that are evoked by moral violations or virtues, motivate moral behavior, and play a crucial role in social cohesion and cooperation.See full article →
Moral Foundations Theory: Moral Foundations Theory (MFT) is a social psychological theory proposing that human morality is built upon a small set of innate, universal psychological systems, or 'foundations,' that are shaped by culture and experience.See full article →
Moral Psychology in Children: Moral psychology in children examines the developmental trajectory of moral cognition, emotion, and behavior from infancy through adolescence, exploring how evolutionary pressures may have shaped the human capacity for morality.See full article →
Moralistic Punishment: Moralistic punishment refers to the costly enforcement of social norms and cooperation, often by third parties who are not directly harmed by the transgression, and is considered a key mechanism for maintaining large-scale cooperation in human societies.See full article →
Moralizing High Gods: Moralizing high gods are supernatural agents believed to be omniscient, omnipotent, and concerned with human morality, often punishing transgressions and rewarding prosocial behavior.See full article →
Multilevel Selection Theory: Multilevel selection theory proposes that natural selection can operate on multiple levels of biological organization, including genes, individuals, and groups.See full article →
Narrative as Adaptation: The hypothesis of narrative as adaptation proposes that the human capacity for creating and comprehending stories is not merely a byproduct of other cognitive abilities but an evolved psychological mechanism that conferred significant fitness benefits to ancestral populations.See full article →
Natural Experiments in Evolutionary Psychology: Natural experiments are research designs that leverage naturally occurring events or conditions that mimic controlled experimental manipulations, allowing researchers to investigate causal relationships without direct intervention.See full article →
Natural Pedagogy: Natural pedagogy is a theory positing that humans possess an evolved, species-specific cognitive adaptation enabling the efficient and rapid transmission of cultural knowledge from experienced individuals to novices.See full article →
Natural Selection: Natural selection is the differential survival and reproduction of individuals due to differences in phenotype, a key mechanism of evolutionary change that drives adaptation.See full article →
Naturalistic Fallacy: The naturalistic fallacy is the erroneous inference that what *is* natural is inherently good or ought to be. It is a central concept in meta-ethics and frequently invoked in critiques of evolutionary explanations of human behavior, particularly when such explanations are…See full article →
Network Reciprocity: Network reciprocity describes how the structure of interactions within a population can facilitate the evolution and maintenance of cooperative behaviors, even in the absence of direct or indirect reciprocity.See full article →
Neutral Theory of Molecular Evolution: The Neutral Theory of Molecular Evolution proposes that most evolutionary changes at the molecular level, and most of the variation within species, are not caused by natural selection but by genetic drift of neutral mutations.See full article →
Niche Construction: Niche construction refers to the process by which organisms, through their activities, modify their own and others' environments, thereby altering the selection pressures acting upon them and subsequent generations.See full article →
Niko Tinbergen: Nikolaas "Niko" Tinbergen (1907–1988) was a Dutch ethologist and ornithologist, one of the founders of the field of ethology, which studies animal behavior in natural environments from an evolutionary perspective.See full article →
Norenzayan, Ara: Ara Norenzayan is a prominent social psychologist known for his work on the cognitive and evolutionary foundations of religious belief, cultural evolution, and the psychological impacts of WEIRD (Western, Educated, Industrialized, Rich, Democratic) societies.See full article →
Norenzayan, Ara: Ara Norenzayan is a prominent social psychologist whose work bridges cognitive science, cultural psychology, and evolutionary theory to explore the origins and functions of religious belief and prosociality.See full article →
Norms and Norm Enforcement: Social norms are shared rules of conduct that prescribe appropriate behavior within a group, and their enforcement mechanisms are crucial for maintaining cooperation and social order in human societies.See full article →
Not in Our Genes: Published in 1984 by Richard Lewontin, Steven Rose, and Leon Kamin, *Not in Our Genes: Biology, Ideology, and Human Nature* is a foundational critique of biological determinism and sociobiology, arguing that complex human behaviors and social inequalities cannot be reduced to…See full article →
Numerical cognition in non-humans: Numerical cognition in non-human animals refers to their capacity to process and represent numerical information, challenging the long-held view that such abilities are uniquely human and providing insights into the evolutionary origins of mathematical thought.See full article →
Obesity and Evolutionary Mismatch: Obesity, characterized by excessive body fat accumulation, is a major public health concern often understood through the lens of evolutionary mismatch.See full article →
Object Location Memory: Object location memory refers to the cognitive ability to remember where specific objects are situated in space, a critical function for navigating and interacting with the environment.See full article →
Oblique Cultural Transmission: Oblique cultural transmission refers to the process by which individuals acquire cultural information, beliefs, and behaviors from non-parental adults in their social group.See full article →
Old-friends hypothesis: The old-friends hypothesis proposes that the human immune system co-evolved with a diverse array of microorganisms, including commensals, symbionts, and harmless parasites, and that modern lifestyles lacking exposure to these 'old friends' contribute to the rise of inflammatory…See full article →
Open Science in Evolutionary Psychology: Open science refers to a set of practices designed to increase the transparency, accessibility, and reproducibility of scientific research. In evolutionary psychology, these practices are increasingly adopted to enhance the rigor and credibility of studies, particularly given…See full article →
Optimality Models in Evolution: Optimality models are theoretical tools used in evolutionary biology to predict the behavioral or physiological traits that would maximize an organism's fitness under specific environmental conditions, assuming natural selection acts as an optimizing force.See full article →
Origins of Language: The origins of human language represent one of the most profound and enduring puzzles in evolutionary psychology, concerning how a complex communication system with syntax, semantics, and recursive properties could have evolved from simpler forms.See full article →
Origins of Music: The evolutionary origins of music refer to the adaptive or non-adaptive pathways through which human musicality may have emerged, examining its potential functions and the selective pressures that might have shaped it.See full article →
Outgroup hostility: Outgroup hostility refers to negative attitudes, emotions, and behaviors directed towards individuals perceived as belonging to a group other than one's own.See full article →
Overimitation in Children: Overimitation refers to the tendency of human children to meticulously copy all observed actions, including causally irrelevant ones, when learning from others.See full article →
Ovulatory Shift Hypothesis: The ovulatory shift hypothesis posits that women's mate preferences and behaviors change across the menstrual cycle, specifically becoming more attuned to cues of genetic quality and masculinity during the periovulatory phase when fertility is highest.See full article →
Pain as Adaptation: Pain is a complex, unpleasant sensory and emotional experience associated with actual or potential tissue damage, serving as a crucial adaptive mechanism that alerts organisms to danger and motivates protective behaviors.See full article →
Pair Bonding: Pair bonding refers to the formation of a strong, selective, and enduring social and sexual affiliation between two individuals, often involving biparental care of offspring.See full article →
Parent-Offspring Conflict: Parent-offspring conflict describes the evolutionary tension arising from the differing optimal fitness interests of parents and their offspring, particularly regarding the allocation of parental resources.See full article →
Parental Investment Theory: Parental Investment Theory, developed by Robert Trivers, explains how differences in the energetic and survival costs of producing and raising offspring lead to divergent reproductive strategies between sexes, influencing mate choice, sexual competition, and the evolution of sex…See full article →
Parochial Altruism: Parochial altruism describes the phenomenon where individuals exhibit altruistic behavior towards members of their own group while simultaneously displaying hostility or indifference towards out-group members.See full article →
Partner Choice in Cooperation: Partner choice refers to the ability of individuals to select with whom they interact, particularly in cooperative endeavors, and to terminate interactions with non-cooperative partners.See full article →
Pascal Boyer: Pascal Boyer is a French anthropologist and cognitive scientist known for his pioneering work in the cognitive science of religion, applying principles of evolutionary psychology and cognitive anthropology to explain the widespread recurrence and persistence of religious beliefs…See full article →
Pathogen avoidance and prejudice: Pathogen avoidance theory proposes that evolved psychological mechanisms designed to detect and avoid infectious disease agents can influence social cognition, potentially contributing to various forms of prejudice and xenophobia.See full article →
Pathogen Disgust: Pathogen disgust is a fundamental human emotion characterized by a strong aversion to stimuli perceived as potential sources of disease or contamination.See full article →
Patriarchy in Evolutionary Perspective: Patriarchy, broadly defined as a social system where men hold primary power and predominate in roles of political leadership, moral authority, social privilege, and control of property, has been a subject of extensive debate within evolutionary psychology regarding its origins,…See full article →
Phenotypic Plasticity: Phenotypic plasticity refers to the ability of a single genotype to produce different phenotypes in response to varying environmental conditions.See full article →
Pheromones in Human Mating: Pheromones are chemical signals released by an organism that elicit a specific behavioral or physiological response in another organism of the same species.See full article →
Phylogenetic Comparative Methods: Phylogenetic comparative methods (PCMs) are a suite of statistical techniques used to analyze data collected from multiple species while accounting for their evolutionary relationships.See full article →
Phylogenetic Signal in Psychology: Phylogenetic signal refers to the tendency for closely related species to resemble each other more than distantly related species due to shared evolutionary history.See full article →
Pinker's Defenses of Evolutionary Psychology: Steven Pinker has been a prominent public advocate and defender of evolutionary psychology, articulating its core tenets and responding to common criticisms, particularly those stemming from fears of biological determinism or political misuse.See full article →
Pleasure and Adaptive Function: Pleasure, in an evolutionary context, is understood as a subjective experience that motivates organisms to engage in behaviors beneficial for survival and reproduction.See full article →
Politics of Evolutionary Psychology: The politics of evolutionary psychology refers to the societal and academic controversies that arise from its theories and findings, particularly concerning human nature, social structures, and policy implications.See full article →
Polyandry: Polyandry refers to a mating system where one female mates with multiple males, contrasting with polygyny (one male, multiple females) and monogamy (one male, one female).See full article →
Polygenic Scores in Behavioral Genetics: Polygenic scores (PGS), also known as polygenic risk scores (PRS), are a method for quantifying an individual's genetic predisposition to a trait or disease by summing the effects of many genetic variants identified through genome-wide association studies (GWAS).See full article →
Polygyny: Polygyny refers to a mating system where one male mates with multiple females, while each female mates with only one male. In evolutionary psychology, polygyny is a significant topic because it represents the most common form of polygamy in human societies and has profound…See full article →
Poverty of the Stimulus: The poverty of the stimulus (POS) argument posits that the linguistic input available to children during language acquisition is insufficient to account for the rich, complex, and systematic knowledge of grammar they ultimately acquire, suggesting an innate, domain-specific…See full article →
Pre-linguistic Communication: Pre-linguistic communication refers to the diverse range of non-verbal signals and behaviors used by infants and their caregivers to exchange information and regulate social interaction before the acquisition of spoken language.See full article →
Pregnancy Sickness: Pregnancy sickness, commonly known as morning sickness, refers to the nausea and vomiting experienced by many pregnant individuals, particularly during the first trimester.See full article →
Preparedness Theory of Phobias: The preparedness theory of phobias posits that humans and other animals are biologically predisposed to acquire fears of certain stimuli more readily than others, due to ancestral threats that posed significant survival risks.See full article →
Preregistration in Evolutionary Research: Preregistration involves specifying a research plan, including hypotheses, methods, and analysis strategy, prior to data collection or analysis.See full article →
Prestige Bias in Cultural Learning: Prestige bias in cultural learning describes the tendency for individuals to preferentially acquire information, behaviors, or norms from others who are perceived as successful, skilled, or high-status within a social group.See full article →
Prestige vs. Dominance: The distinction between prestige and dominance describes two distinct pathways to achieving social status and influence within a group. Dominance relies on coercion and intimidation, while prestige is freely conferred by others in recognition of an individual's valued skills,…See full article →
Pride: Pride is a self-conscious emotion that arises from achievements or social recognition and is theorized to have evolved to motivate individuals to pursue socially valued goals and signal status.See full article →
Prospective Memory: Prospective memory refers to the ability to remember to perform an intended action at a future point in time or in response to a specific cue.See full article →
Pubertal Timing: Pubertal timing refers to the age at which an individual undergoes the biological changes associated with sexual maturation, a process that is highly variable across individuals and populations.See full article →
Public-goods game: The public-goods game is an experimental paradigm used to study cooperation in groups, particularly the tension between individual self-interest and collective benefit.See full article →
Public-Goods Provision in Humans: Public goods are resources or services that are non-excludable and non-rivalrous, meaning that once provided, they are available to all members of a group, and one individual's consumption does not diminish another's.See full article →
Race and IQ Controversy: The 'Race and IQ controversy' refers to the long-standing and highly contentious debate concerning observed differences in average intelligence test scores among human populations categorized as 'races' and the extent to which these differences are attributable to genetic versus…See full article →
Randolph Nesse: Randolph Nesse is a physician and evolutionary biologist known for his foundational work in evolutionary medicine and psychiatry, particularly his contributions to understanding the adaptive functions of emotions and the evolutionary origins of vulnerability to mental and…See full article →
Reasoning about Contagion: Reasoning about contagion refers to a suite of cognitive mechanisms evolved to detect, avoid, and manage infectious diseases, which have posed a significant threat to survival and reproduction throughout human evolutionary history.See full article →
Reciprocal Altruism: Reciprocal altruism is a theory explaining the evolution of altruistic behavior between non-kin individuals through the expectation of future reciprocation, posited as a mechanism for mutual benefit over time.See full article →
Reconciliation in Primates: Reconciliation refers to post-conflict affiliative interactions between former opponents, serving to repair social relationships and restore group cohesion.See full article →
Recursion in Language: Recursion in language refers to the ability to embed structures within similar structures, allowing for the generation of an infinite number of complex expressions from a finite set of elements.See full article →
Religious Conversion and Identity: Religious conversion, the process by which individuals adopt a new religious belief system or affiliation, is examined within evolutionary psychology as a phenomenon deeply intertwined with social identity, group cohesion, and the adaptive benefits of coalitional behavior.See full article →
Reproductive Futurity in Homosexual Orientation: The concept of reproductive futurity, which posits that evolutionary explanations for traits must ultimately link to reproductive success, presents a significant challenge when applied to homosexual orientation.See full article →
Reproductive Scheduling: Reproductive scheduling refers to the timing and patterning of key reproductive events over an organism's lifespan, including age at first reproduction, interbirth intervals, and total reproductive lifespan.See full article →
Reputation and Aggression: Reputation, understood as the public perception of an individual's past actions and likely future behavior, plays a crucial role in shaping aggressive displays and responses across many species, including humans.See full article →
Reputation and Large-Scale Cooperation: Reputation, understood as an individual's public standing based on past actions, plays a crucial role in enabling and maintaining cooperation, particularly in large, anonymous social groups where direct reciprocity is difficult to sustain.See full article →
Reputation Systems in Cooperation: Reputation systems are mechanisms by which individuals acquire and share information about the past behavior of others, influencing future social interactions and promoting cooperation.See full article →
Reverse engineering the mind: Reverse engineering the mind is a central methodological metaphor in evolutionary psychology, proposing that the human mind, like complex artifacts, can be understood by inferring its design and function from its observable outputs.See full article →
Reward and Dopamine in Evolutionary Perspective: Reward systems, particularly those involving dopamine, are fundamental neural mechanisms that motivate adaptive behaviors by signaling the value of outcomes and guiding learning.See full article →
Richard Dawkins: Richard Dawkins is a prominent British evolutionary biologist, ethologist, and author, best known for popularizing the gene-centric view of evolution and coining the term 'meme'.See full article →
Richard Lewontin: Richard Lewontin (1929–2021) was an American evolutionary biologist, geneticist, and prominent critic of genetic determinism and reductionist approaches to biology, including sociobiology and early evolutionary psychology.See full article →
Richard Lewontin on Evolutionary Psychology: Richard Lewontin was a prominent evolutionary geneticist and vocal critic of sociobiology and evolutionary psychology, arguing against genetic determinism, adaptationism, and the reductionist tendencies he perceived in these fields.See full article →
Richerson, Peter: Peter Richerson is an American ecologist and evolutionary biologist known for his foundational contributions to the field of gene-culture coevolution, particularly through the development of dual inheritance theory with Robert Boyd.See full article →
Richerson, Peter J.: Peter J. Richerson is a prominent evolutionary ecologist known for his foundational contributions to gene-culture coevolutionary theory, which posits that human behavior and institutions are shaped by the dynamic interplay between genetic and cultural evolution.See full article →
Ridley, Matt: Matt Ridley is a British science writer, journalist, and businessman known for his popular science books exploring evolutionary biology, genetics, economics, and the history of innovation.See full article →
Ridley, Matt: Matt Ridley is a British science writer, journalist, and businessman known for his popular science books that often explore evolutionary themes, particularly in human behavior, economics, and societal progress.See full article →
Risk-taking and Male Behavior: Risk-taking behavior is observed across many species, often exhibiting sex differences, with males typically engaging in higher levels of risky activities.See full article →
Ritual and Music: Ritual and music are ubiquitous features of human cultures, often deeply intertwined, and their origins and functions are a significant area of inquiry within evolutionary psychology.See full article →
Ritual in Evolutionary Perspective: Rituals are formalized, repetitive, and often symbolic behaviors that lack direct instrumental purpose but are ubiquitous across human cultures.See full article →
Robert Boyd: Robert Boyd is an anthropologist and evolutionary theorist known for his foundational contributions to the study of cultural evolution, particularly through the development of mathematical models that integrate genetic and cultural transmission.See full article →
Robert Sapolsky: Robert Sapolsky is a neuroendocrinologist and primatologist renowned for his interdisciplinary work on stress, neurobiology, and behavior, particularly in the context of evolutionary and social factors.See full article →
Robert Trivers: Robert Trivers is a foundational figure in modern evolutionary theory, whose work in the early 1970s provided crucial theoretical frameworks for understanding social behavior from an evolutionary perspective.See full article →
Robert Wright: Robert Wright is an American journalist and author known for his accessible explorations of complex scientific and philosophical topics, particularly his role in popularizing evolutionary psychology through his seminal work, *The Moral Animal*.See full article →
Robin Dunbar: Robin Dunbar is a British evolutionary psychologist and anthropologist best known for proposing Dunbar's Number, a theoretical cognitive limit to the number of stable social relationships an individual can maintain.See full article →
Romantic Love: Romantic love is a complex suite of emotions, motivations, and behaviors characterized by intense attraction, attachment, and care for a specific individual, widely understood in evolutionary psychology as an evolved mechanism to facilitate long-term pair-bonding for cooperative…See full article →
Rough-and-Tumble Play: Rough-and-tumble play refers to vigorous, often physical, social play behavior observed across many mammalian species, including humans, characterized by chasing, wrestling, and mock fighting.See full article →
Runaway Sexual Selection: Runaway sexual selection describes a process where a female preference for an exaggerated male trait and the male trait itself co-evolve, leading to increasingly extreme and potentially maladaptive features.See full article →
Sacred Values: Sacred values are those principles or beliefs that individuals or groups hold to be non-negotiable and immune to instrumental trade-offs, often eliciting strong emotional responses and motivating costly actions.See full article →
Sadness as Adaptation: Sadness, often perceived as a negative emotional state, is theorized within evolutionary psychology to serve adaptive functions, signaling a need for withdrawal, eliciting social support, or facilitating cognitive reappraisal in response to loss or setback.See full article →
Sahlins on Sociobiology: Marshall Sahlins was a prominent cultural anthropologist whose 1976 work, *The Use and Abuse of Biology: An Anthropological Critique of Sociobiology*, offered one of the earliest and most influential scholarly critiques of sociobiology, particularly its application to human…See full article →
Sally-Anne Task: The Sally-Anne task is a classic false-belief test used in developmental psychology and cognitive science to assess an individual's Theory of Mind (ToM), the ability to attribute mental states—beliefs, desires, intentions—to oneself and others.See full article →
Sarah Blaffer Hrdy: Sarah Blaffer Hrdy is a prominent primatologist and anthropologist whose work has significantly influenced evolutionary psychology, particularly through her research on female reproductive strategies, alloparenting, and the evolution of human sociality.See full article →
Savanna Hypothesis of Landscape Preference: The savanna hypothesis posits that humans possess an evolved preference for landscapes resembling the East African savanna, characterized by open grasslands with scattered trees, due to its historical association with resources and safety for early hominins.See full article →
Scott Atran: Scott Atran is an anthropologist and cognitive psychologist known for his interdisciplinary research on the cognitive and evolutionary foundations of religion, violence, and cultural transmission.See full article →
Self-conscious emotions and morality: Self-conscious emotions, such as guilt, shame, pride, and embarrassment, are complex affective states that arise from self-reflection and evaluation against social norms and personal standards.See full article →
Self-protective aggression: Self-protective aggression refers to aggressive behaviors enacted by an individual or group to defend against perceived threats to their physical safety, resources, or social standing.See full article →
Self-report methods in evolutionary psychology: Self-report methods, which involve individuals providing information about their own thoughts, feelings, attitudes, or behaviors, are a common data collection technique in evolutionary psychology.See full article →
Sensitive Periods in Development: Sensitive periods are specific developmental windows during which an organism is particularly receptive to certain environmental stimuli, and during which particular experiences have a disproportionately large and often irreversible effect on development.See full article →
Sensory Bias in Sexual Selection: Sensory bias, also known as pre-existing bias or receiver bias, describes the phenomenon where a preference for a particular trait in potential mates evolves in a non-mating context, prior to the evolution of the trait itself.See full article →
Separation Distress: Separation distress refers to the suite of emotional, physiological, and behavioral responses exhibited by individuals, particularly infants and young animals, when separated from primary attachment figures.See full article →
Sex Differences in Aggression: Sex differences in aggression are a robust and widely observed phenomenon across human societies and many animal species, posing significant questions for evolutionary psychology regarding their origins, functions, and manifestations.See full article →
Sex Differences in Jealousy: Sex differences in jealousy refer to hypothesized evolved psychological mechanisms that lead men and women to prioritize different cues of infidelity, specifically sexual infidelity for men and emotional infidelity for women.See full article →
Sex Differences in Mate Preferences: Sex differences in mate preferences refer to the distinct patterns observed in what men and women seek in a long-term partner, a topic central to evolutionary psychology's understanding of human mating strategies.See full article →
Sex Differences in Spatial Cognition: Sex differences in spatial cognition refer to consistent, statistically significant disparities observed between males and females in various spatial abilities, with evolutionary psychology exploring their potential adaptive origins related to ancestral division of labor and…See full article →
Sex-typed play in childhood: Sex-typed play refers to the consistent preference children show for activities, toys, and play partners typically associated with their biological sex.See full article →
Sexual Antagonism: Sexual antagonism describes a conflict of interest between males and females over reproductive strategies, where a trait that enhances fitness in one sex reduces fitness in the other.See full article →
Sexual Coercion in Humans: Sexual coercion in humans refers to any behavior by which an individual obtains sexual contact against another's explicit consent, ranging from verbal pressure to physical force.See full article →
Sexual Coercion in Non-Human Animals: Sexual coercion in non-human animals refers to the use of force, threat, or harassment by one individual to overcome the resistance of another to mating, a phenomenon observed across diverse taxa.See full article →
Sexual Conflict: Sexual conflict arises from the divergent evolutionary interests of males and females regarding reproduction, leading to an antagonistic coevolutionary dynamic where adaptations in one sex to maximize fitness impose costs on the other.See full article →
Sexual Dimorphism: Sexual dimorphism refers to distinct differences in morphology, physiology, and behavior between males and females of the same species, extending beyond the primary sexual organs.See full article →
Sexual Disgust: Sexual disgust refers to a specific sub-type of the emotion of disgust, elicited by stimuli related to sexual activity or reproduction, particularly those perceived as contaminating or violating norms of sexual hygiene and appropriateness.See full article →
Sexual Selection: Sexual selection is a mode of natural selection in which individuals with certain inherited characteristics are more likely than others to obtain mates.See full article →
Sexual Selection in Humans: Sexual selection describes the evolutionary process by which certain traits increase an individual's reproductive success through enhanced mating opportunities, rather than through survival.See full article →
Sexual Strategies Theory: Sexual Strategies Theory (SST) proposes that human males and females have evolved distinct, context-dependent mating strategies due to fundamental differences in parental investment and reproductive biology.See full article →
Sexy-son hypothesis: The sexy-son hypothesis posits that females may choose mates based on traits that enhance the reproductive success of their male offspring, even if these traits offer no direct benefits to the female or incur costs.See full article →
Shamanism: Shamanism refers to a set of ancient religious practices centered on a practitioner, the shaman, who is believed to mediate between the human and spirit worlds through altered states of consciousness.See full article →
Shame: Shame is a complex, self-conscious emotion characterized by feelings of worthlessness, humiliation, and a desire to hide or disappear, often arising from a perceived failure to meet social or personal standards.See full article →
Short-term and long-term mating strategies: Short-term and long-term mating strategies refer to distinct evolved psychological and behavioral repertoires individuals employ to secure mates, differing primarily in the duration and commitment level sought from a sexual partner.See full article →
Showing-off Hypothesis: The showing-off hypothesis proposes that individuals engage in costly, risky, or difficult activities to signal their quality, skill, or access to resources to others, thereby enhancing their social status, attracting mates, or securing cooperative benefits.See full article →
Sibling Conflict: Sibling conflict refers to the antagonistic interactions between siblings, which are understood in evolutionary psychology as arising from competition over parental resources and differing genetic interests, despite shared relatedness.See full article →
Sibling Relationships in Development: Sibling relationships are a fundamental and enduring aspect of human social life, profoundly shaping individual development and reproductive strategies from an evolutionary perspective.See full article →
Sickness Behavior: Sickness behavior refers to a coordinated set of adaptive changes in an organism's behavior, physiology, and metabolism that occur in response to infection or injury.See full article →
Skin Pigmentation and Selection: Skin pigmentation is a highly visible human trait that has evolved primarily as an adaptation to varying levels of ultraviolet (UV) radiation across different geographic regions.See full article →
Sleep in Evolutionary Perspective: Sleep, a ubiquitous and seemingly vulnerable state across the animal kingdom, presents a significant evolutionary puzzle due to its apparent costs and universal persistence.See full article →
Slow-Fast Life-History Continuum: The slow-fast life-history continuum describes a fundamental trade-off in how organisms allocate finite resources to growth, maintenance, reproduction, and parental investment, resulting in diverse strategies ranging from rapid maturation and high fecundity to delayed…See full article →
Smith, Subrena: Subrena Smith is a philosopher of science known for her critiques of evolutionary psychology, particularly her arguments concerning the evidential basis and methodological commitments of the discipline.See full article →
Smith, Subrena: Subrena Smith is a philosopher of science known for her critical analyses of evolutionary psychology, particularly her arguments concerning the evidential basis and testability of its core hypotheses.See full article →
Smuts, Barbara: Barbara Smuts is a primatologist and evolutionary anthropologist known for her extensive fieldwork on baboons and her theoretical contributions to understanding female social relationships, male-female dynamics, and the evolution of friendship and cooperation in non-human…See full article →
Snake Detection Theory: Snake Detection Theory posits that the unique visual and cognitive adaptations of primates, particularly their acute vision and specialized neural circuitry, evolved primarily as a defense mechanism against snakes.See full article →
Social Brain Hypothesis: The social brain hypothesis posits that the cognitive demands of living in complex, stable social groups drove the evolution of larger brains, particularly the neocortex, in primates.See full article →
Social Referencing in Infants: Social referencing is the process by which infants look to a caregiver's emotional expressions to guide their own behavior in ambiguous or novel situations.See full article →
Sociobiology: Sociobiology is the scientific study of the biological (especially evolutionary) bases of all social behavior, proposing that complex social traits observed in animals, including humans, can be understood through the lens of natural selection and genetic fitness.See full article →
Sociobiology Study Group: The Sociobiology Study Group was a collective of scientists and activists, primarily associated with Science for the People, formed in the mid-1970s to critically examine and challenge the claims of sociobiology, particularly as presented by E. O. Wilson.See full article →
Spandrel: In evolutionary biology, a spandrel refers to a phenotypic characteristic that arises as a byproduct of other adaptations, rather than being directly selected for its own function.See full article →
Speech and Song Origins: The evolutionary origins of human speech and song represent a fundamental problem in evolutionary psychology, exploring how these complex, uniquely human capacities for vocal communication and musical expression emerged and co-evolved.See full article →
Sperm Competition: Sperm competition refers to the direct competition between the sperm of two or more males to fertilize a single ovum, occurring when a female mates with multiple males within a reproductive cycle.See full article →
Spider Phobia: Spider phobia, or arachnophobia, is a common specific phobia characterized by an intense, irrational fear and avoidance of spiders. Evolutionary psychology proposes that this widespread fear may be an evolved preparedness or predisposition, rather than a purely learned response,…See full article →
Spirit Beliefs: Spirit beliefs, encompassing the conviction that non-physical entities or essences inhabit the world and can influence human affairs, are a cross-culturally pervasive phenomenon.See full article →
Standard Evolutionary Metatheory: Standard Evolutionary Metatheory (SEM) refers to a foundational theoretical framework within evolutionary psychology, primarily articulated by Tooby and Cosmides (1992), which posits a specific architecture for the human mind and a methodology for its study.See full article →
Status (Evolutionary Perspective): Status, from an evolutionary perspective, refers to an individual's relative social rank or position within a group, often associated with differential access to resources and reproductive opportunities.See full article →
Stephen Jay Gould: Stephen Jay Gould (1941–2002) was a prominent American paleontologist, evolutionary biologist, and historian of science, widely recognized for his influential contributions to evolutionary theory and his incisive critiques of various aspects of evolutionary psychology.See full article →
Stephen Jay Gould on Evolutionary Psychology: Stephen Jay Gould, a prominent paleontologist and evolutionary biologist, was a vocal critic of evolutionary psychology, primarily challenging its methodological foundations and the scope of its explanatory claims.See full article →
Steven Pinker: Steven Pinker is a prominent cognitive psychologist, linguist, and popular science author whose work has significantly influenced evolutionary psychology by advocating for a computational theory of mind and emphasizing the evolutionary origins of human cognition and behavior.See full article →
Storytelling in Evolutionary Perspective: Storytelling, a ubiquitous human activity, is examined from an evolutionary perspective to understand its potential adaptive functions and the cognitive mechanisms that underpin it.See full article →
Stranger Anxiety: Stranger anxiety, or stranger wariness, is a common developmental stage characterized by distress or avoidance behaviors when an infant or young child encounters unfamiliar individuals.See full article →
Strategic Pluralism in Human Mating: Strategic pluralism in human mating describes the evolutionary perspective that humans possess multiple, conditionally expressed mating strategies rather than a single, fixed approach.See full article →
Strong Reciprocity: Strong reciprocity describes a predisposition to cooperate with others and punish non-cooperators, even when doing so is costly and provides no direct, future material benefit to the individual.See full article →
Supernatural Punishment Hypothesis: The supernatural punishment hypothesis proposes that beliefs in powerful, moralistic deities or ancestral spirits who monitor and punish norm violations evolved as a mechanism to promote large-scale cooperation and reduce free-riding within human societies.See full article →
Symons, Donald: Donald Symons is a foundational figure in the development of modern evolutionary psychology, particularly renowned for his pioneering work on human sexuality from an evolutionary perspective.See full article →
Symons, Donald: Donald Symons is a foundational figure in evolutionary psychology, best known for his pioneering work applying evolutionary theory to human sexuality, particularly through his influential book *The Evolution of Human Sexuality* (1979).See full article →
Synchronous Movement and Dance: Synchronous movement and dance, characterized by coordinated rhythmic actions among individuals, are explored in evolutionary psychology as potential adaptations for social bonding, cooperation, and signaling, with roots in primate and hominin social behaviors.See full article →
Testosterone and Human Behavior: Testosterone, an androgenic steroid hormone, plays a significant role in the development and regulation of various human behaviors, particularly those related to status-seeking, competition, and aggression.See full article →
The Adaptationist Program: The adaptationist program is a research strategy in evolutionary biology that seeks to explain the traits of organisms as products of natural selection, designed to solve specific adaptive problems.See full article →
The Challenge Hypothesis: The Challenge Hypothesis posits that testosterone levels in males are not constantly high but rather fluctuate in response to social challenges, particularly those involving competition for mates or status.See full article →
The Cognitive Niche: The cognitive niche hypothesis proposes that humans evolved to occupy a unique ecological niche defined by their capacity for complex reasoning, social learning, and technological innovation.See full article →
The Extended Phenotype: The extended phenotype refers to the idea that an organism's phenotype is not limited to its physical body but includes all effects it has on the environment, including other organisms, that are mediated by its genes.See full article →
The Faculty of Language: Narrow and Broad (FLN/FLB): The Faculty of Language: Narrow and Broad (FLN/FLB) distinction, proposed by Hauser, Chomsky, and Fitch (2002), posits that the human capacity for language comprises both a broadly shared set of cognitive abilities and a uniquely human, domain-specific computational mechanism,…See full article →
The Faculty of Language: Narrow and Broad (FLN/FLB) Distinction: The Faculty of Language: Narrow and Broad (FLN/FLB) distinction, proposed by Hauser, Chomsky, and Fitch (2002), categorizes the components of human language, aiming to identify which aspects are uniquely human and which are shared with other species.See full article →
The Language Instinct: The concept of a "language instinct" posits that humans possess an innate, species-specific capacity for acquiring and using language, rather than language being solely a learned cultural invention.See full article →
The Price Equation: The Price equation is a mathematical expression that describes how the average value of a trait in a population changes over time due to selection and transmission.See full article →
The Puzzle of Large-Scale Cooperation: The puzzle of large-scale cooperation refers to the challenge of explaining how humans manage to cooperate in groups far exceeding the size of kin or reciprocal dyads, often with non-relatives and without direct monitoring, which appears to contradict predictions from standard…See full article →
The Replication Crisis in Evolutionary Psychology: The replication crisis refers to a systemic problem within scientific research where many published findings cannot be reproduced by independent researchers, raising concerns about the reliability and validity of the scientific literature.See full article →
The Selfish Gene: The 'selfish gene' concept, popularized by Richard Dawkins, posits that natural selection operates primarily at the level of the gene, viewing organisms as temporary vehicles for the propagation of their genetic material.See full article →
The Sociobiology Controversy: The sociobiology controversy refers to the intense academic and public debate ignited by the publication of Edward O. Wilson's *Sociobiology: The New Synthesis* in 1975, particularly concerning the application of evolutionary principles to human behavior and social organization.See full article →
The Spandrels Paper: Stephen Jay Gould and Richard Lewontin's 1979 paper, "The Spandrels of San Marco and the Panglossian Paradigm: A Critique of the Adaptationist Programme," argued against the pervasive assumption that all biological traits are direct products of natural selection, proposing that…See full article →
The Trolley Problem in Evolutionary Perspective: The Trolley Problem is a series of thought experiments in ethics that explores intuitions about moral dilemmas involving sacrificing one individual to save a greater number.See full article →
Theory of Mind: Theory of Mind (ToM) refers to the cognitive capacity to attribute mental states—beliefs, desires, intentions, knowledge, and emotions—to oneself and to others, and to understand that these mental states can differ from one's own and can predict behavior.See full article →
Third-party punishment: Third-party punishment refers to the act of an uninvolved observer imposing a cost on a transgressor for violating a social norm, even when the punisher incurs a cost and receives no direct benefit.See full article →
Thomas Henry Huxley: Thomas Henry Huxley (1825–1895) was a prominent English biologist and anatomist, best known as a staunch advocate for Charles Darwin's theory of evolution by natural selection.See full article →
Thrifty-gene hypothesis: The thrifty-gene hypothesis proposes that genes that were advantageous in environments characterized by unpredictable food scarcity, by promoting efficient energy storage, became maladaptive in modern environments of abundant food, contributing to metabolic diseases like type 2…See full article →
Tinbergen's Four Questions: Tinbergen's four questions provide a foundational framework for understanding the causes of behavior, distinguishing between proximate and ultimate explanations.See full article →
Tit-for-tat: Tit-for-tat is a strategy for repeated interactions in game theory, particularly the Prisoner's Dilemma, which involves cooperating on the first move and then mirroring the opponent's previous move.See full article →
Tolerated Theft: Tolerated theft is a concept in evolutionary biology and economics that describes a situation where a possessor of a resource permits another individual to take a portion of it, even though the possessor could physically defend the entire resource.See full article →
Tooby and Cosmides' Replies to Critics: John Tooby and Leda Cosmides are foundational figures in evolutionary psychology, whose work on massive modularity and the computational theory of mind has generated substantial debate.See full article →
Tragedy of the Commons: The tragedy of the commons describes a situation where individual users, acting independently and rationally according to their own self-interest, deplete a shared limited resource, even when it is clear that it is not in anyone's long-term interest for this to happen.See full article →
Trust and Cooperation: Trust and cooperation are fundamental social phenomena that have received significant attention within evolutionary psychology, as they present a challenge to models of individual self-interest and require explanations for their emergence and maintenance in populations.See full article →
Trust Game: The trust game is an experimental economics paradigm used to study the evolution and mechanisms of trust and reciprocity in human interactions.See full article →
Twin Studies: Twin studies are a research methodology used to estimate the relative contributions of genetic and environmental factors to variation in a trait or phenotype.See full article →
Ultimate vs. Proximate Causation: The distinction between ultimate and proximate causation, introduced by Ernst Mayr, is fundamental to evolutionary psychology, providing a framework for understanding the different levels at which biological phenomena, including behavior, can be explained.See full article →
Ultimatum Game: The Ultimatum Game is an experimental economics paradigm used to study human decision-making, particularly regarding fairness, altruism, and cooperation.See full article →
Unit of Selection: The unit of selection refers to the level of biological organization upon which natural selection acts, leading to differential survival and reproduction.See full article →
Universal Grammar: Universal Grammar (UG) refers to the innate linguistic knowledge or set of principles and parameters that are proposed to underlie the structure of all human languages.See full article →
Universal Morality and Relativism: The debate over universal morality and relativism concerns whether moral principles are objective and universally applicable across all human societies, or if they are culturally constructed and vary fundamentally.See full article →
Vengeance and Feud: Vengeance and feud refer to retaliatory actions taken in response to perceived wrongs, often involving cycles of violence between individuals or groups.See full article →
Vertical Cultural Transmission: Vertical cultural transmission refers to the process by which cultural information, including beliefs, values, knowledge, and practices, is passed down from parents to their offspring.See full article →
Vignette Methodology: Vignette methodology involves presenting participants with short, hypothetical scenarios (vignettes) and asking them to respond, offering a controlled yet ecologically relevant means to investigate complex social judgments, moral intuitions, and decision-making processes,…See full article →
Virulence Evolution: Virulence evolution examines how pathogens evolve their harmfulness to hosts, a key area of evolutionary medicine that seeks to understand the ecological and evolutionary pressures shaping disease severity.See full article →
Vocal Learning Evolution: Vocal learning is the ability to acquire and produce novel vocalizations through imitation, a rare trait among animals but a foundational component of human spoken language.See full article →
Voice Attractiveness: Voice attractiveness refers to the qualities of the human voice that are perceived as desirable by listeners, often influencing social judgments, mate choice, and reproductive success.See full article →
Waist-to-hip ratio research: Research into waist-to-hip ratio (WHR) explores its role as a potential signal of fertility and health in human mate selection, examining cross-cultural preferences and underlying biological mechanisms.See full article →
Wartime Sexual Violence: Wartime sexual violence refers to acts of sexual aggression committed during armed conflict, often against civilian populations. Evolutionary psychological perspectives examine this phenomenon by considering potential adaptive functions related to resource acquisition, group…See full article →
Wason Selection Task: The Wason Selection Task is a classic problem in the psychology of reasoning, originally designed to test formal logical abilities. Its subsequent reformulation by Leda Cosmides to incorporate social contract theory became a foundational argument for the modularity of human…See full article →
Wayfinding Strategies: Wayfinding strategies encompass the cognitive and behavioral processes organisms use to navigate their environment, locate resources, and return to specific places.See full article →
WEIRD Samples: WEIRD samples refer to research participants drawn from Western, Educated, Industrialized, Rich, and Democratic societies, a demographic that is vastly overrepresented in psychological and behavioral science research.See full article →
Wilson, Margo: Margo Wilson (1942-2009) was a pioneering evolutionary psychologist whose work, often in collaboration with Martin Daly, fundamentally shaped the study of human violence, risk-taking, and parental investment from an adaptationist perspective.See full article →
Wilson, Margo: Margo Wilson (1942–2009) was a pioneering evolutionary psychologist whose work, often in collaboration with Martin Daly, fundamentally shaped the study of human violence, risk-taking, and reproductive strategies from an adaptationist perspective.See full article →
Witchcraft Accusations Across Cultures: Witchcraft accusations, a recurring phenomenon across diverse human societies, are examined through an evolutionary lens as potentially adaptive responses to social stressors, resource competition, and the maintenance of group cohesion, often leveraging evolved psychological…See full article →
Within-group vs. between-group violence: Violence, a pervasive feature of human societies, can be broadly categorized by whether it occurs between members of the same social group or between distinct social groups.See full article →
Working Memory and Evolved Capacity: Working memory refers to the cognitive system responsible for temporarily holding and manipulating information relevant to ongoing tasks, a capacity widely considered fundamental to higher-order cognition.See full article →
Wright, Robert: Robert Wright is an American journalist and author known for popularizing evolutionary psychology and game theory, particularly through his influential book *The Moral Animal*.See full article →
Young-male syndrome: Young-male syndrome refers to a cluster of behavioral patterns, primarily observed in human males during late adolescence and early adulthood, characterized by increased risk-taking, aggression, and competitive striving for status.See full article →