The aim of this paper is to analyse changes and evolutions within the relationship between
Existentialism and Marxism in Sartre’s works. During the 50s and later, Sartre tried to make his
account of radical and absolute freedom compatible with Marxist’s philosophy of history and
its views on class struggle and revolution. This attempt was particularly evident in the Critique
of Dialectical Reason, Marxism and Subjectivity, Existentialism and Marxism and several
articles published in Les Temps Modernes. Nevertheless, this was not the only perspective
Sartre developed during his life. In his last interview he implicitly referred to his project to
elaborate an Existentialist Ethics based on the moral value of authenticity as sketched in
Notebooks for an Ethics. Therefore, this paper will examine Sartre’s early critiques with
regards to Marxism and try to evaluate the importance of a Post-Marxist Existentialism.
