Everything had started so well. With the appointment of Karl Mannheim in Frankfurt, Kurt Riezler, the chancellor of the Johann-Wolfgang-Goethe-University, took a decisive further step to make Frankfurt the centre of sociology. In 1930, the same year when Mannheim moved from Heidelberg to Frankfurt, a professorship for social philosophy was established for Max Horkheimer. In October 1930 he assumed the related leadership of the Institute for Social Research.