is a social historian and emeritus professor of history at the Free University of Berlin. He was president of the Berlin Social Science Center (WZB) and editor of the journal Neue Gesellschaft-Frankfurter Hefte for many years. His recent publications include: Kampf um die Moderne: Das lange 19. Jahrhundert in Deutschland (The Battle for Modernity: The Long Nineteenth Century in Germany), published by Klett-Kotta in 2021.