Big ideas often get watered down when tested empirically. Scott Appleby’s masterful Ambivalence of the Sacred—which includes deep, rich discussions of religious peacebuilding—is usually reduced to “sometimes religion leads to conflict, sometimes it leads to peace.” Samuel Huntington’s “clash of civilizations” is the same way, with most testing it by looking at whether Muslims tend to fight Christians. But his ideas, especially in the book, are much richer than that, and also more dangerous. Huntington saw his work as a restorative project for the West, something that is now being taken up by...








