Between Reason and History examines the role of the idea of progress both in Ju¬rgen Habermas's critical social theory and in critical social theory in general. The reception to Habermas's magnum opus, The Theory of Communicative Action, has tended to downplay the theory of social evolution it contains, but there are no in-depth examinations of this aspect of Habermas's critical theory. This book fills this gap by providing a comprehensive and detailed examination of Habermas's theory of social evolution, its significance within the wider scope of his critical social theory, and the importance of a theoretical understanding of history for any adequate critical social theory.