Iván Szelényi covers Sigmund Freud's contribution to social theory in this Yale lecture from Foundations of Modern Social Thought. He traces Freud's early years in Vienna developing psychoanalysis alongside Jung and Ferenczi, then walks through the core clinical concepts, the talking cure, dream work, and the structural model of id, ego, and superego, along with the competing drives of Eros and Thanatos. The lecture moves from the clinical to the social, examining how Freud extends these ideas to civilization itself in Totem and Taboo and Civilization and Its Discontents. Szelényi draws out the Nietzschean resonance in Freud's claim that repressing individual urges is what allows civilization to develop, while the same repression generates psychological and social discontent. Chapter markers separate the historical background, the clinical breakthroughs, and the two major texts, giving a clear structure to a dense set of ideas.