is Professor emeritus of modern German and European history at the Open University of Hagen. His most recent book, co-authored by Detlef Lehnert, was published by J.H.W. Dietz Nachf. under the title Eine kurze Geschichte der deutschen Sozialdemokratie (A Short History of German Social Democracy).

 

is an emeritus professor of modern German and European history at the Open University of Hagen. J.H.W. Dietz and Successors published his Eine kurze Geschichte der deutschen Sozialdemokratie (A Brief History of German Social Democracy), co-written by Detlef Lehnert, in August, 2023.