Darwin's theory of evolution provides a single theoretical framework for biology, and all life sciences, today. But among humanities scholars, it is widely assumed that our rich cultural and behavioural development operates outside the rules of evolutionary theory. In fact, Darwin's theory has been considered taboo in the study of the social sciences, in the light of the inhumane theories of social Darwinism that emerged at the end of the nineteenth century. But, now, David Sloan Wilson, one of the world’s foremost evolutionary thinkers, expands on what we traditionally consider biological.