 Until 1985 most of Löwy's works concerned the sociological and historical study of Marxist thought.This applies not only to his doctorate on the young Marx and his Habilitation on György Lukács, but to most of the essays which he published, some of which were collected in books, as well as for two anthologies, on the National Question (with Georges Haupt and Claudie Weill) and on Marxism in Latin America.Marxist epistemology also takes a central place in his work on sociology of knowledge from 1985.