Abstract
The sociologist Georg Simmel and the philosopher Ernst Cassirer developed strikingly similar theories of modernity. Both viewed the transition from a substantialist to a functionalist view of the world as the modern age's distinguishing characteristic. But they interpreted this transition from very different philosophical perspectives. Simmel subscribed to a phenomenalism derived from Mach, whereas Cassirer advocated an objectivism inspired by a particular interpretation of Kant. This epistemological disagreement helps account for the two thinkers’ divergent cultural attitudes. Whereas Simmel viewed the complex structures of modernity as an alienation from the flow of subjective life, Cassirer viewed them as a proper expression of humanity's symbolising capacity. Simmel's cultural pessimism developed into an enthusiasm for radical collective action, especially during the First World War. Cassirer's optimism, conversely, guarded him against this temptation