David Sloan Wilson´s Darwin´s Cathedral takes the radical step of joining the two, in the process proposing an evolutionary theory of religion that shakes both evolutionary biology and social theory at their foundations.The key, argues Wilson, is to think of society as an organism, an old idea that has received new life based on recent developments in evolutionary biology. If society is an organism, can we then think of morality and religion as biologically and culturally evolved adaptations that enable human groups to function as single units rather than mere collections of individuals? Wilson brings a variety of evidence to bear on this question, from both the biological and social sciences.