The book of world-known German philosopher Jurgen Habermas is devoted to the Marxist social theory and in general to potential of the evolutionary concept of society. A wide range of topics is comprised: from the role of philosophy in Marxism and rational and ethical foundations of social identity to comparative theories and problem of legitimacy. J.Habermas does not only critically rethink Marxist concept, but builds a coherent theoretical alternative to it. The power of the book is that the key problems of social theory are considered not only in the abstract plane, but in the context of contemporary, keen, topical socio-political challenges. Namely the nature of current social crises, conflicts of legitimation of the contemporary state, ...