Over 2,300 years ago, the Ancient Greeks gave us philosophy-the love of wisdom. From Socrates and Epicurus to Plato and Aristotle, they grappled with the big questions-who are we? Why are we here? What is a good life? How should we lead our life? Later, the natural sciences split away from philosophy, and then the humanities did as well, and fragmented into separate disciplines, all of which tell us something about human nature-the universal, the culture-specific, and the individuated. In the light of all that that the new sciences tell us about human nature, is there a case for...