*This article attempts a Marxist critique of Alain Badiou’s positions. The importance of Badiou’s ontology as an affirmation of the possibility of radical-historical novelty is stressed, but also its limits. These limits have to do with Badiou’s abandonment of a dialectical-relational conception of social reality, his refusal of any causal connection between social reality, political decision and event, and the absence of a theory of ideology and hegemony in his work. Consequently, Badiou’s notion of a ‘subtractive’ politics cannot be considered (...) an answer to the open questions of communist strategy, despite his endorsement of the ‘communist hypothesis’. (shrink)