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 moral norms. This area of study is crucial for understanding the universality and flexibility of human cooperation and social cognition.
The concept of fairness, broadly defined as the impartial and just treatment of individuals or groups, is a fundamental component of human sociality and cooperation. Evolutionary psychology posits that mechanisms for fairness may have evolved to facilitate mutually beneficial interactions, resolve conflicts, and maintain social cohesion within groups (Trivers, 1971; Cosmides & Tooby, 1992). However, while a basic sensitivity to fairness appears to be a human universal, the specific expressions, expectations, and enforcement of fairness norms exhibit significant variation across cultures.
The Argument for Evolved Fairness
Proponents of an evolved basis for fairness argue that humans possess innate psychological mechanisms that predispose them to detect and respond to unfairness. These mechanisms are thought to have evolved in ancestral environments where repeated interactions and reciprocal altruism were crucial for survival and reproductive success. The ability to identify cheaters, punish free-riders, and engage in equitable exchanges would have conferred adaptive advantages (Cosmides & Tooby, 1992). Experimental paradigms like the Ultimatum Game (UG) and Dictator Game (DG) are frequently used to probe these mechanisms. In a typical UG, a proposer offers a split of a sum of money to a responder; if the responder accepts, both get their share, but if the responder rejects, neither gets anything. Rational economic theory predicts that responders should accept any non-zero offer, but across many societies, responders often reject offers perceived as unfairly low, even at a personal cost. This rejection is interpreted as a manifestation of a fairness preference or a willingness to punish unfairness.
Empirical Evidence from Cross-Cultural Games
Early studies using the Ultimatum Game primarily involved Western university students, who typically rejected offers below 20-30% and made offers around 40-50%. These findings were initially interpreted as strong evidence for universal fairness preferences. However, subsequent cross-cultural research challenged this simplistic view by demonstrating substantial variation in game behavior across diverse societies.
A landmark study by Henrich et al. (2001) involved conducting the Ultimatum Game, Dictator Game, and other economic games in 15 small-scale societies across five continents, including foragers, horticulturalists, and pastoralists. This research revealed that, while the mean offer in the UG was never zero and rejections of low offers were common, there was considerable variation. For example, the Machiguenga of Peru made very low offers in the UG and rarely rejected low offers, reflecting a culture where market integration and cooperation beyond the family unit are less pronounced. Conversely, the Lamalera whale hunters of Indonesia, known for their highly cooperative hunting practices, made very high offers, often exceeding 50%, and accepted even very low offers, possibly reflecting norms of generosity and communal sharing. The Orma of Kenya, who engage in extensive market exchange, also made high offers and rejected low ones, suggesting that exposure to market economies can promote fairness norms that resemble those in Western societies.
Further studies, such as those by Herrmann et al. (2008) across 16 societies, have explored the role of “altruistic punishment” – the willingness to incur costs to punish norm violators – and found significant cultural differences in its prevalence and intensity. Societies with stronger institutions for cooperation and market integration tended to exhibit more altruistic punishment.
Explaining the Variation
Several factors have been proposed to explain the observed cross-cultural variation in fairness behaviors:
- Market Integration: Societies with greater participation in market economies tend to exhibit higher offers and rejections in the Ultimatum Game, suggesting that experience with impersonal exchange and the need to establish trust with strangers fosters generalized fairness norms (Henrich et al., 2001).
- Cooperation and Interdependence: The degree to which a society relies on large-scale cooperation for subsistence (e.g., communal hunting, irrigation systems) correlates with stronger fairness norms and a greater willingness to punish unfairness. In highly interdependent societies, maintaining a reputation for fairness and punishing free-riders is crucial for group survival (Gintis et al., 2005).
- Cultural Norms and Institutions: Specific cultural norms, such as those emphasizing generosity, reciprocity, or status hierarchies, can shape how fairness is perceived and enacted. Formal and informal institutions that enforce norms and resolve disputes also play a significant role. For example, societies with strong rule of law and low corruption tend to have higher levels of trust and fairness in economic games.
- Social Learning: Children acquire fairness norms through observation, direct instruction, and participation in social practices within their cultural context. Studies on children's fairness behavior across cultures show developmental trajectories that are influenced by local norms (e.g., Blake & McAuliffe, 2011).
Critiques and Open Questions
While cross-cultural economic games have provided invaluable insights, they are not without critiques. Some scholars argue that these games, particularly the Ultimatum Game, may not fully capture the complexity of real-world fairness decisions, which are often embedded in ongoing relationships and specific social contexts rather than anonymous, one-shot interactions (Guala, 2005). The artificiality of the lab setting and the use of small monetary stakes in some societies might also influence behavior in ways that do not perfectly reflect everyday moral decision-making.
Another debate concerns the interpretation of rejections in the Ultimatum Game. While often attributed to a preference for fairness, rejections could also be driven by anger, a desire to signal one's toughness, or other emotional responses that are not strictly about equity (Sanfey et al., 2003). Furthermore, the distinction between distributive fairness (how resources are allocated) and procedural fairness (the fairness of the process by which decisions are made) is important, and economic games primarily focus on the former.
Future research continues to explore the interplay between universal psychological predispositions and culturally specific learning, examining how different ecological, economic, and institutional factors shape the development and expression of fairness across the human spectrum. Understanding this variation is key to developing a comprehensive evolutionary psychological account of human morality. The field also increasingly examines the role of specific emotions, cognitive biases, and neurological underpinnings in mediating fairness judgments across diverse populations. The extent to which fairness is driven by innate, domain-specific modules versus more general cognitive capacities that are shaped by cultural input remains an active area of inquiry. (Chudek & Henrich, 2011).
- Google Scholar: Cross-cultural variation in fairnessScholarly literature; ranked by Google Scholar's relevance.
- The Moral AnimalRobert Wright · 1994Accessible introduction
This foundational book explores the evolutionary roots of human morality, including fairness, using Darwinian theory. It provides an accessible yet rigorous overview of how natural selection shaped our psychological predispositions for social behaviors, serving as an excellent entry point for understanding evolved fairness.
- Unto OthersElliott Sober, David Sloan Wilson · 1998Influential critique
This book critically examines the evolution of altruism and cooperation, offering a nuanced perspective on how group selection and other mechanisms might explain behaviors like fairness. It challenges purely individualistic explanations and deepens the understanding of prosociality.
- Not by Genes AlonePeter J. Richerson, Robert Boyd · 2005Field-defining work
This seminal work on gene-culture coevolution directly addresses how culture and genes interact to shape human behavior, including moral norms like fairness. It provides a robust framework for understanding cross-cultural variation as an outcome of cultural evolution, complementing purely genetic explanations.
- Moral OriginsChristopher Boehm · 2012Recent synthesis
Boehm argues that human morality, including fairness and egalitarianism, evolved through self-domestication and the suppression of alpha males in early human groups. This book offers a compelling hypothesis for the origins of our unique moral psychology and its role in cooperation.
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