Joshua Cherniss (DPhil Oxford, PhD Harvard) is associate professor of government at Georgetown University, Washington, DC. His work focuses primarily on the history of liberal thought; political thought in Europe and America in the 20th century; and the ethics of political action. He is the author of A Mind and its Time: The Development of Isaiah Berlin's Political Thought (Oxford University Press, 2013) and Liberalism in Dark Times: The Liberal Ethos in the Twentieth Century (Princeton University Press, 2021).