 The prolonged debate in the German-speaking lands over psychologism was eventually brought to an end by World War One. The war brought with it an intellectual climate in which attacks on one’s colleagues were regarded as utterly inappropriate. Moreover, it also lead to a clear division of labor between psychologists and philosophers: while philosophers concentrated on the ideological task of celebrating the German ‘genius of war’, experimental psychology focused on the training and testing of soldiers. After the war, both academic (anti-naturalistic) philosophy and (experimental) psychology had to cope with, and accommodate to, an intellectual environment that was hostile to science, rationality, and systematic knowledge. The project of a scientifically-minded philosophy with experimental psychology as its central pillar quickly lost support. And hence the charge of psychologism could no longer play a central role.