This paper revisits the conceptual history of the early Frankfurt School’s investigations into the authoritarian character, the set of sadomasochistic character traits that dispose an individual or group to seek their own domination. This research project, which produced Fromm’s Studies on Authority and Family and Horkheimer’s Egoism and Freedom Movements in 1936 and ended in 1939 with Fromm’s expulsion from the Frankfurt School, is generally held to have been a theoretically-unproductive and abortive endeavour. We dispute such a reading by reconstructing (...) the key concepts and methods of this research project, and demonstrating its breadth and coherence. In so doing we illustrate the centrality of Fromm’s contribution to the Frankfurt School early work on authority and indicate that the proper point of origin for those seeking to grasp the Frankfurt School’s research on the authoritarian character is 1930, the year in which Fromm joined the Frankfurt School. (shrink)