Any book in the making for almost thirty years is indebted to many helping hands. This one is based in part on my Castle Lectures at Yale University, where the critical commentary of Bryan Garsten, Phil Gorski, Laurie Santos, Steven Smith, and Chris Udry resulted in many improvements. This is the second time that I have learned from Yale's social science faculty. The first was as a student in the precursor to the Ethics, Politics and Economics major, which sponsored my Castle lectures. My first debt, then, is to my mentor and inspiration in that