According to the reigning competition-driven model of evolution, selfish behaviors that maximize an organism's reproductive potential offer a fitness advantage over self-sacrificing behaviors--rendering unselfish behavior for the sake of others a mystery that requires extra explanation. Evolution, Games, and God addresses this conundrum by exploring how cooperation, working alongside mutation and natural selection, plays a critical role in populations from microbes to human societies. Inheriting a tendency to cooperate, argue the contributors to this book, may be as beneficial as...