Prosocial behavior

Prosocial behavior is conduct that goes beyond narrow personal advantage and can benefit other people or the group. It includes punishing perceived unfairness without expecting a material return, cooperating with strangers, and contributing to shared goods. Its significance lies in a recurring paradox: actions that appear individually irrational can make collective life more workable, but the trust and cooperation they sustain are fragile when people believe others are exploiting them.

Fairness and Strong Reciprocity

The public response to Richard Grasso’s compensation illustrates how prosocial behavior can take the form of punishment. In September 2003, the head of the New York Stock Exchange faced public outrage after a proposed lump-sum payment of $139.5 million, combining retirement benefits, deferred pay, and bonuses, became public. The exchange’s board had agreed to the payment, and the public did not have to fund it; nevertheless, outrage made it impossible for Grasso to remain in office. People who condemned the package generally received no concrete personal benefit from doing so.

Economists Samuel Bowles and Herbert Gintis describe this willingness to punish what is judged to be bad behavior, even without personal material gain, as strong reciprocity. The response is not necessarily altruism: people may act because an arrangement violates their sense of what a fair exchange should be. Yet the collective consequences can be prosocial. Ultimatum-game responders who reject unfair offers help sustain equitable expectations, while public pressure over compensation can lead an organization to scrutinize more carefully what its chief executive is worth. The point is not that every such reaction is economically self-interested, but that an individually costly act can have a collectively beneficial result.

Cooperation Beyond Repeated Exchange

Repeated interaction can help explain cooperation among people who expect to deal with one another again. In Robert Axelrod’s account, successful cooperation begins with a willingness to cooperate but also requires a readiness to punish noncooperation: a strategy described as nice, forgiving, and retaliatory. The prospect of future dealings gives people a reason to preserve trust. But that explanation is incomplete when cooperation occurs in one-off encounters, where there is no later opportunity to reward or discipline the other person.

People donate to charities, buy goods on eBay without seeing them first, and share songs through Kazaa despite receiving no direct benefit from letting strangers access their computers’ hard drives. They also tip at restaurants they do not expect to revisit, including restaurants far from home. The prospect of returning may sometimes matter, and the possibility of public reprimand may discourage withholding a tip. But tipping also reflects an accepted convention: customers recognize that tips are how servers make a living. These examples suggest that a society’s cooperative character is tested not only in familiar, repeated dealings but in how its members treat people they may never meet again.

Evidence Across Societies

A late-1990s study supervised by Samuel Bowles sent twelve field researchers—eleven anthropologists and one economist—to fifteen small-scale societies. The groups included three foraging societies, six that relied on slash-and-burn agriculture, four nomadic herding groups, and two small agricultural societies. Researchers had participants play three behavioral-economics games: the ultimatum game, the public-goods game, and the dictator game. In the dictator game, unlike the ultimatum game, the recipient could not reject the proposer’s offer.

In a strictly self-protective strategy, players could avoid losses but would give up opportunities for mutual gain. Instead, every society showed significant departures from that purely rational pattern. The direction and degree of those departures differed across cultures, so the study did not find one uniform form of prosocial conduct. It did find a relationship with market integration: people in more market-oriented societies made higher offers in the dictator and ultimatum games, contributed more cooperatively in public-goods games, and showed strong reciprocity when given the opportunity. The implication is qualified rather than absolute: markets may not teach people to trust, but market participation can make trust easier.

Incentives, Free Riding, and Fragility

Public-goods experiments show why prosocial cooperation can erode. In a game devised by Ernst Fehr and Simon Gächter, four people each start with twenty tokens and play four rounds. A token contributed to the common pot costs its contributor one token, but gives 0.4 tokens to each of the four players. The contributor receives only 0.4 in return, while the group receives 1.6 altogether. If everyone keeps their tokens, each finishes with twenty; if everyone contributes all their tokens, each finishes with thirty-two. For an individual, however, the tempting strategy is to keep one’s own tokens and benefit from everyone else’s contributions.

Most participants initially contribute about half their tokens. As they see others free riding, contributions fall; by the final round, 70 to 80 percent of players are free riding, leaving the group poorer than it would have been under sustained cooperation. The pattern connects experimental behavior to taxpaying. Taxes fund services such as roads, schools, police, fire protection, military defense, and scientific research, but many of these benefits are nonexcludable: people can benefit whether or not they personally contribute. That creates an incentive to evade payment even though widespread evasion would undermine the goods everyone relies on.

Tax compliance therefore cannot rest on law alone. The evidence describes Americans as contingent consenters: many are willing to pay their share if they believe others are doing so and that people who evade taxes can be caught and punished. When people suspect that others are breaking the rules without consequence, compliance begins to feel like being taken advantage of. Prosocial cooperation depends not simply on goodwill but on confidence that participation and enforcement are sufficiently reciprocal.

Collective Judgment and Public Life

The same tension appears in collective decision-making. In an experiment by Angela Hung and Charles Plott, students drew marbles from one of two urns: one contained twice as many light as dark marbles, and the other twice as many dark as light marbles. Participants privately observed their own draw but publicly announced only which urn they thought was being used. When paid for individual correctness, they often followed earlier guesses instead of relying on their private evidence; information cascades began in 78 percent of trials. When rewards depended on whether the group’s majority answer was correct, students attended more to their own imperfect information and less to others’ guesses. Individual guesses could consequently be wrong more often while the group’s collective judgment became significantly more accurate.

This result presents autonomy as a condition of aggregation: a group can use more information when members do not simply copy one another. A related proposal for intelligence gathering, the public Policy Analysis Market, was intended to invite people to trade on forecasts concerning the Middle East and other events. Its public access prompted objections that ordinary people might profit from terrible events; Senators Ron Wyden and Byron Dorgan led the effort to end the plan. The case distinguishes predictive aggregation from questions of public legitimacy: a forecast market might draw on information outside established agencies, but opening it to the public also raises concerns about who is invited to participate and what kinds of outcomes the mechanism appears to reward.

Prosocial behavior is thus not a synonym for perfect collective judgment or an assurance that every group will reach a just outcome. Democratic deliberation also raises a distinct question: whether democracy exists to reveal the public interest, protect self-rule, or provide people with involvement and control. The account’s broader conclusion is that democracy’s decisions need not always embody the wisdom of a crowd for democratic practice to matter. By requiring people to accept an opponent’s victory and the prospect of another chance, it makes compromise and continued cooperation possible. In this view, prosociality is neither pure generosity nor a guarantee of agreement; it is part of the difficult social practice through which people live together and pursue mutual benefit.