A modest tribute to commemorate the 40th death anniversary of the foremost French thinker, this book attempts to expose the political project of Jean-Paul Sartre. Starting with a fresh look at the controversial life and theses of this brilliant mind, the book navigates through the evolution of the Sartrean concept of authenticity.How is it possible to make a transition from the transcendental realm of ontology to the historical domain of politics? Are Existentialism, with its affirmation of freedom, and Marxism, with its affirmation of determinism, reconcilable?How successful was Sartre in his quest for the reconciliation of Existentialism and Marxism? How adequate and how coherent to human experience is the Sartrean discussion of collective authenticity?