Buller, David

David Buller is a prominent philosopher of science whose work has significantly engaged with, and often challenged, the theoretical and empirical foundations of evolutionary psychology. His most influential contribution is his book Adapting Minds: Evolutionary Psychology and the Persistent Quest for Human Nature (2005), which offers a systematic critique of what he identifies as the “Santa Barbara school” of evolutionary psychology, primarily associated with the work of Leda Cosmides and John Tooby.

The Argument in Adapting Minds

Buller's Adapting Minds argues that a significant portion of evolutionary psychology, particularly its modularity hypothesis and its claims about universal human nature, rests on problematic assumptions and interpretations of evidence. He contends that many evolutionary psychologists commit what he terms the “monolithic mistake,” treating evolutionary psychology as a single, unified theoretical enterprise, rather than a diverse field with varying approaches and levels of empirical support. Buller distinguishes between what he calls "evolutionary psychology sensu lato" (EP sensu lato), which refers to any application of evolutionary theory to understanding the mind, and "evolutionary psychology sensu stricto" (EP sensu stricto), which denotes the specific theoretical framework developed by Cosmides and Tooby.

His primary target is EP sensu stricto, which he characterizes by several key tenets: the massive modularity hypothesis, the idea that the mind is composed of numerous domain-specific psychological adaptations; the notion that these adaptations are species-typical and universal, having evolved in the Pleistocene environment of evolutionary adaptedness (EEA); and the assertion that human behavior today is best understood as the output of these ancient, fixed mental modules. Buller argues that these tenets are often presented as established facts rather than testable hypotheses.

Critiques of Core Tenets

Buller's critique of massive modularity centers on the argument that the evidence for such extensive domain-specificity is often weak or ambiguous. He suggests that many cognitive phenomena attributed to dedicated modules could be explained by more general-purpose cognitive mechanisms operating on specific inputs. He points to developmental plasticity and individual variation as factors that are often downplayed or ignored by proponents of massive modularity, arguing that a focus on universal, species-typical adaptations overlooks the significant role of learning, culture, and individual experience in shaping cognitive architecture.

Regarding the concept of the EEA, Buller contends that its use by some evolutionary psychologists is overly simplistic and speculative. He argues that the Pleistocene was a highly variable period, and the notion of a single, stable environment that shaped all human psychological adaptations is an oversimplification. This critique implies that attributing specific psychological traits to adaptations for a particular set of Pleistocene challenges often lacks sufficient empirical grounding and ignores the continuous evolutionary changes that occurred throughout human history.

Buller also scrutinizes the methodology of inferring psychological adaptations from current human behavior or cross-cultural universals. He argues that the leap from observing a behavior to positing a dedicated, genetically encoded psychological module for that behavior is often premature and ignores alternative explanations, such as cultural learning, social construction, or more general cognitive processes. He emphasizes the importance of distinguishing between explanations of how a trait could have evolved and evidence that it did evolve in a specific way.

Alternative Perspectives and Influence

While critical of EP sensu stricto, Buller is not anti-evolutionary in his approach to psychology. Instead, he advocates for a more empirically rigorous and theoretically flexible evolutionary psychology (EP sensu lato). He suggests that evolutionary theory can be applied more effectively by focusing on specific, testable hypotheses about the evolution of particular cognitive capacities, while remaining open to the possibility of general-purpose cognitive mechanisms and acknowledging the profound impact of gene-culture coevolution and developmental processes. He encourages a greater integration of insights from developmental biology, cognitive neuroscience, and anthropology.

Buller's work has sparked considerable debate within evolutionary psychology and philosophy of science. Proponents of EP sensu stricto, such as Tooby and Cosmides, have responded to his critiques by defending their theoretical framework and empirical methods, arguing that Buller misrepresents their positions or overlooks key aspects of their arguments. They contend that the massive modularity hypothesis is a necessary consequence of the computational theory of mind and that the concept of the EEA, while an abstraction, is a useful heuristic for understanding adaptive problems.

Despite these disagreements, Buller's Adapting Minds has been influential in prompting a more critical self-reflection within evolutionary psychology and in encouraging greater methodological rigor. His work is often cited in discussions about the proper scope and methods of evolutionary explanations for human behavior and cognition, contributing to a broader philosophical discourse on the nature of scientific explanation in the behavioral sciences. He represents a significant voice advocating for caution and empirical precision in applying evolutionary theory to the complexities of the human mind. His contributions underscore the ongoing philosophical scrutiny that accompanies the development of scientific fields, particularly those that address fundamental questions about human nature. He has continued to publish on related topics, further refining his arguments and engaging with new developments in the field. His work serves as a reminder that the application of evolutionary theory to human psychology is a complex and often contested endeavor, requiring careful consideration of evidence, methodology, and theoretical assumptions.