Abstract

This paper develops an integrated theoretical explanation of aggression among men, showing that much of that aggression is anchored in naturally-selected psychological adaptations—and, in the case of honor, importantly tied to cultural transmission—designed to solve the recurrent evolutionary problems of status and honor. Both of these problems are—or at least were—very crucial to the reproductive success of men. Maintaining and cultivating honor, engaging in theft, mating competition, war, and gangs are the main phenomena thereby explained in evolutionary terms. Drawing on theoretical and conceptual resources from the evolutionary sciences at large, and in particular evolutionary psychology, the explanation developed here also and importantly pulls together the psychological, developmental, cultural, and ecological dimensions of the phenomena at issue. Doing so allows the model to sketch the ways in which the psychological adaptations underlying aggression are sensitive to both external and individual contingencies and thereby open-ended and flexible. The evolutionary model developed here draws an additional strength from its ability to grapple with individual differences and evolutionarily-novel environments. Finally, the integrated explanation is also synthesized with the evolutionary genetics and heritability of aggression.