Of paramount importance to the natural sciences, the principles of Darwinism, which involve variation, inheritance, and selection, are increasingly of interest to social scientists as well. But no one has provided a truly rigorous account of how the principles apply to the evolution of human society[...]

A few centuries ago, capitalism set in motion an explosion of economic productivity. Markets and private property had existed for millennia, but what other key institutions fostered capitalism's relatively recent emergence? Until now, the conceptual toolkit available to answer this question has been[...]