The combination of historical and theoretical sweep, analytical acumen and synthetic power, imagination and engagement mark this as one of the great works of twentieth-century social theory.

Drawing upon the theories of leading philosophers, the author explores the relationship between thought and action.

Beginning with the classical doctrine of politics as developed by Aristotle, he traces the changing constellation of theory and practice through the work of Machiavelli, More, Hobbes, Hegel and Marx.

Not only does it provide a compelling critique of some of the main perspectives in 20th century philosophy and social science, but it also presents a systematic synthesis of the many themse which have preoccupied Habermas for thirty years.