What are the consequences of Marx's theoretical and political intervention for philosophy? Such is the general question that this book raises, considering it successively from three different points of view: a first part analyzes the general concepts that structure the debate about the "Marxist statute of philosophy"1 (criticism, dialectics and normativity) ; a second, applies to the period of youth during which Marx still expressed himself in an explicitly philosophical way; while a third is interested in the philosophical challenges and in the forms of permanence of modes of philosophical argumentation, typical of the critique of political economy.