We ask a lot of questions about foreign policy on this podcast. Why do certain countries make certain decisions? What are the interests of the players in question? What are the consequences and, of course, the legality of foreign policy choices. In a new book, Joseph Nye, professor emeritus and former dean of the Harvard Kennedy School, asks another question about foreign policy. Do morals matter? Jack Goldsmith sat down with Nye to discuss his new book, 'Do Morals Matter?: Presidents and Foreign Policy from FDR to Trump.' They discussed the ethical and theoretical factors by which Nye judged each president before going through many of the cases he focuses on in the book.