David Rapaport's collection of Otto Fenichel's Rundbriefe (1934-1945) is described as a recently rediscovered, 2,500-page primary source for studying the intellectual

and organizational history of European-American psychoanalysis. Beginning as the confidential newsletter of the Reich-Fenichel "left opposition" within the International Psychoanalytical Association, its function became primarily intellectual as Fenichel's group ceased to function as a caucus. It ended when its editor decided to devote himself to the struggle against neo-Freudianism within psychoanalysis, and to practice as a licensed physician.