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Evolution of fairness and punishment

Date:
March 21, 2010
Source:
University of California - Davis
Summary:
A new study suggests that the cooperative nature of each society is at least partly dependent upon historical forces -- such as religious beliefs and the growth of market transactions.

Study co-author Richard McElreath says the cooperative nature of each society is at least partly dependent upon historical forces.
Credit: Karin Higgins/UC Davis photo

Researchers have long been puzzled by large societies in which strangers routinely engage in voluntary acts of kindness, respect and mutual benefit even though there is often an individual cost involved.

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While evolutionary forces associated with kinship and reciprocity can explain such cooperative behavior among other primates, these forces do not easily explain similar behavior in large, unrelated groups, like those that most humans live in.

A new study co-authored by University of California, Davis, anthropologist Richard McElreath and published March 18 in Science suggests that the cooperative nature of each society is at least partly dependent upon historical forces -- such as religious beliefs and the growth of market transactions.

The study also found the extent to which a society uses punishment to enforce norms increases and decreases with the number of people in the society.

"It is likely that small and large communities regulate cooperation -- mutual defense, conservation, etc. -- in different ways, because different mechanisms of monitoring and enforcement of norms work better at different scales of society," explained McElreath, an associate professor of anthropology at UC Davis.

"A small town in Kansas, for example, can likely rely upon reputation and the fact that everyone knows everyone else, while the residents of New York City need some mechanism, like punishment, that can work in the absence of reliable reputations," he said.

McElreath was one of 14 researchers on three different continents who participated in the project detailed in the paper, "Markets, Religion, Community Size, and the Evolution of Fairness and Punishment." The first author is Joseph Henrich, an associate professor in the departments of Psychology and Economics at the University of British Columbia.

The researchers probed why communities often cooperate in diverse ways, from mutual defense to conservation. People engage in such mutually beneficial acts even though they may be individually costly.

Using behavioral experiments administered across 15 diverse populations, the study sought to measure the influence of three different mechanisms -- punishment, market integration and religious beliefs -- that might maintain cooperation within societies. Market integration is the extent to which individuals use anonymous, rule-governed transactions to buy and sell goods.

The researchers found that overt punishment, religious beliefs that can act as a form of psychological punishment and market integration each were correlated with fairness in the experiments.

The project received funding from the National Science Foundation, the MacArthur Norms and Preferences Network, the Max Planck Institute for Social Anthropology and the Russell Sage Foundation.


Story Source:

The above story is based on materials provided by University of California - Davis. Note: Materials may be edited for content and length.


Journal Reference:

  1. Joseph Henrich, Jean Ensminger, Richard McElreath, Abigail Barr, Clark Barrett, Alexander Bolyanatz, Juan Camilo Cardenas, Michael Gurven, Edwins Gwako, Natalie Henrich, Carolyn Lesorogol, Frank Marlowe, David Tracer, and John Ziker. Markets, Religion, Community Size, and the Evolution of Fairness and Punishment. Science, 19 March 2010 327: 1480-1484 DOI: 10.1126/science.1182238

Cite This Page:

University of California - Davis. "Evolution of fairness and punishment." ScienceDaily. ScienceDaily, 21 March 2010. <www.sciencedaily.com/releases/2010/03/100318141551.htm>.
University of California - Davis. (2010, March 21). Evolution of fairness and punishment. ScienceDaily. Retrieved October 24, 2014 from www.sciencedaily.com/releases/2010/03/100318141551.htm
University of California - Davis. "Evolution of fairness and punishment." ScienceDaily. www.sciencedaily.com/releases/2010/03/100318141551.htm (accessed October 24, 2014).

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