  Theodor W. Adorno was one of the most important philosophers and social critics in Germany after World War II. Although less well known among anglophone philosophers than his contemporary Hans-Georg Gadamer, Adorno had even greater influence on scholars and intellectuals in postwar Germany. In the 1960s he was the most prominent challenger to both Sir Karl Popper's philosophy of science and Martin Heidegger's philosophy of existence. Jürgen Habermas, Germany's foremost social philosopher after 1970, was Adorno's student and assistant. The scope of Adorno's influence stems from the interdisciplinary character of his research and of the Frankfurt School to which he belonged. It also stems from the thoroughness with which he examined Western philosophical traditions, especially from Kant onward, and the radicalness to his critique of contemporary Western society. He was a seminal social philosopher and a leading member of the first generation of Critical Theory.