The papers in this volume, first published in 1982, deal with a number of different aspects of Marx's ideas and the varying constructions put on them by later Marxists. Based on a lecture series, they examine Marxist views of the nature of philosophy, of history and historical explanation, the role and importance of politics, and of literature and the place of ethics. Among the Marxists considered are Lukacs, Sartre, Habermas, Althusser and Macherey. A continuous concern through the volume is the relation within Marxist thought of fact and value, with the implications that will have for our actions.