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How Altruism Can Prevail In An Evolutionary Environment, Ted Bergstrom, Oded Stark

Ted C Bergstrom

This paper considers a series of examples in which evolution supports cooperative behavior in single-shot prisoners' dilemma. Examples include genetic inheritance for asexual siblings and for sexual diploid siblings. We also study two models of ``cultural inheritance''; one in which siblings copy either their parents or an extrafamilial role model and one in which neighbors arrayed along a circular road copy successful neighbors. Finally, we consider a model in which parents choose their behavior, realizing that it may be imitated by their children. A unifying principle of these models is that cooperative behavior more is likely to be sustained in …