Historical dynamics unfolds in economically and socially fundamentally antinomic categories. Dialectical materialism places man at the heart of unconfirmed action in the sense of history, but to modify the possibilities by pushing back without limits the structures of the capitalist system and bureaucratized human society. The need for social justice imposes itself on freedom as a political modality, a vital obligation for the reappropriation of the social being of man. The relentless logic of the immanent conflict to the exploitative relationship that makes it possible to become another-society of society. Understanding the fundamental relationships between classes, she is able to preserve the intelligibility of historical development.