Sheri Berman, Professor of Political Science at Barnard College, Columbia University, is the author of The Social Democratic Moment: Ideas and Politics in the Making of Interwar Europe (Harvard University Press, 1998), The Primacy of Politics: Social Democracy and the Making of Europe’s Twentieth Century (Cambridge University Press, 2006), and Democracy and Dictatorship in Europe: From the Ancien Régime to the Present Day (Oxford University Press, 2019).