'This is an important book. It provides a rare, concise and penetrating analysis of East German theorists' reactions to the evolving problems of socialism in the GDR … a highly readable introduction to some of the major intellectual debates during the Ulbricht years … excellent book … Caldwell has written an important study which will reward its readers with a much more sophisticated understanding of the GDR and its intellectual climate. For this reason, the book is not just important reading for those interested in social and political theory, but also for those interested in the political, cultural and everyday history of the GDR.' German History