Warren Breckman is the Sheldon and Lucy Hackney Professor of History at the University of Pennsylvania, where he has taught since 1995. He is the author of Marx, the Young Hegelians and the Origins of Radical Social Theory (Cambridge, 1999), European Romanticism: A Brief History with Documents (2007) and Adventures of the Symbolic: Post-marxism and Radical Democracy (2013). He served as co-editor of the Journal of the History of Ideas (2006–10) and co-edited the volume The Modernist Imagination: Essays in Intellectual History and Critical Theory (2008) also with Peter E. Gordon.