Abstract
This book examines the conditions which make possible an existentialist social philosophy in the writings of Sartre. At issue, of course, is the question of the legitimacy of Sartre's Marxism. To deal with this question, Flynn focuses on the issue of collective responsibility. Is there, in Sartre's later writings, a social ontology which allows one to assign responsibility to a social ensemble? Can Sartre conceive of collectivities in a way which must be possible for any version of Marxism?