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Wednesday, October 26, 2005
This week in Nature
Well, evolution might be responsible for morality and karma among other selfless behavior in humans. Again I apologize to those without institutional subscriptions, but this is certainly an interesting review of models of cooperation designed to figure out the evolutionary benefit of human selflessness. Briefly:
The evolution of cooperation by indirect reciprocity leads to reputation building, morality judgement and complex social interactions with ever-increasing cognitive demands. Indirect reciprocity and public goods games are also closely connected. For example, donors are more generous if they learn that the recipient has recently made a donation to a charitable institution. An even more remarkable effect was found in an experiment alternating rounds of the Public Goods Game with rounds of the indirect reciprocity game. It is known that many players show an initial willingness to contribute to the public good a substantial amount of their endowment, but this willingness often vanishes within a few rounds. This is not the case if indirect reciprocity games are sandwiched between the rounds of the Public Goods Game. If players are informed about their recipient's action in the Public Goods Game, they tend to be more generous towards recipients who contributed much. Anyone else watch My Name is Earl? Also, Chimps are jerks and a nice evolution paper explaining why the final stages of divergence between species occurs, using experimental evidence from tree frogs. |
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