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Costly punishment across human societies
Joseph Henrich1, Richard McElreath, Abigail Barr
1Department of Anthropology, Emory University, 1557 Dickey Drive, Atlanta, GA 30322, USA. jhenric@emory.edu
Science (New York, N.Y.)
|June 24, 2006
Summary
Humans exhibit costly punishment across diverse populations, a behavior linked to altruism and gene-culture coevolution. This willingness to punish inequality is a key factor in understanding human cooperation and sociality.
Area of Science:
- Evolutionary Psychology
- Behavioral Economics
- Cross-Cultural Studies
Background:
- Human cooperation is foundational to sociality.
- Costly punishment, even in one-shot interactions, is proposed as a key psychological element.
- Previous research was limited to industrialized societies, hindering species-wide generalizations.
Purpose of the Study:
- To investigate the universality of costly punishment in human behavior.
- To examine cross-cultural variations in costly punishment.
- To explore the relationship between costly punishment and altruistic behavior.
Main Methods:
- Conducted behavioral experiments across 15 diverse populations worldwide.
- Measured participants' willingness to administer costly punishment in response to unequal behavior.
- Analyzed the covariance between costly punishment and altruistic behavior across populations.
Main Results:
- All tested populations showed a willingness to administer costly punishment when faced with increased inequality.
- Significant variation in the magnitude of costly punishment was observed across different populations.
- Costly punishment demonstrated a positive covariance with altruistic behavior globally.
Conclusions:
- Costly punishment is a widespread human behavior, not limited to industrialized societies.
- The observed cross-cultural variation in punishment magnitude requires explanation within cooperation theories.
- Findings support gene-culture coevolution models of human altruism and cooperation.
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