We are living in an age in which the behavioral sciences have become inescapable. The findings of social psychology and behavioral economics are being employed to determine the news we read, the products we buy, the cultural and intellectual spheres we inhabit, and the human networks, online and in real life, of which we are a part. Aspects of human societies that were formerly guided by habit and tradition, or spontaneity and whim, are now increasingly the intended or unintended consequences of decisions made on the basis of scientific theories of the human mind and human well-being.