The diagnosis of Jewish self-hatred has become almost a commonplace in contemporary cultural and political debates, but the concept's origins are not widely appreciated. In its modern form, it received its earliest and fullest expression in Theodor Lessing's 1930 book Der jüdische Selbstha . Written on the eve of Hitler's ascent to power, Lessing's hotly contested work has been variously read as a defense of the Weimar Republic, a platform for anti-Weimar sentiments, an attack on psychoanalysis, an inspirational personal guide, and a Zionist broadside. This new edition makes a seminal text in Jewish thought accessible to English readers for the first time.