Abstract

This article aims at clarifying the status of the Idea in two of Badiou's recent works: Second manifeste pour la philosophie and L'hypothèse communiste. Badiou sets out from the assumption that the operation with the Idea implies an affirmation of the materialism of a philosophy that is under the conditon of four generic procedures. In his attempt to elaborate Badiou's materialism of the Idea, the author does not turn to Plato, as one would expect, but, rather, to Kant's theory of ideas such as it is presented in the Transcendental Dialectics of the first Critique. In so doing, the author seeks to develop Kant's idea in terms of the act. Posing the question of the Idea in terms of the act has at least two advantages: it shows how the pure reason separates itself from the Thing in itself that affects it while allowing for its appearance in the world.