Sheldon S. Wolin (1922–2015) was professor emeritus of politics at Princeton University. His books include Politics and Vision: Continuity and Innovation in Western Political Thought and Democracy Incorporated: Managed Democracy and the Specter of Inverted Totalitarianism (both Princeton). Nicholas Xenos is professor of political science at the University of Massachusetts, Amherst. His books include Cloaked in Virtue: Unveiling Leo Strauss and the Rhetoric of American Foreign Policy.