De gustibus est disputandum

While rational choice theorists have made great advances in their study of institutions and structures (and how they affect behavior), they have made less progress toward understanding the origins of values. I propose that the emerging field of evolutionary psychology complements rational choice theory by providing a theory of values, and that current explanations of values and preferences, such as learning, norms, and identities, are all compatible with evolutionary psychology, which provides more ultimate explanations for these proximate causes of behavior. The incorporation of evolutionary psychology into rational choice theory can also solve some of the persistent puzzles of rational choice theory: Why do so many players in Prisoner's Dilemma games make the irrational choice to cooperate? Why do people participate in collective action! Why do people sometimes behave "irrationally" by acting on their emotions? Why does rational choice theory appear to be more applicable to men than to women?.