 Cohen’s work culminated in a three part system of philosophy, modeled after Kant’s own tripartite division of critical philosophy: The Logic of Pure Knowledge (Cohen 1902), The Ethics of Pure Will (Cohen 1904), and the Aesthetics of Pure Feeling (Cohen 1912). His most influential works, though, were his interpretation of Kant, principally in Kant’s Theory of Experience, which was significantly revised and expanded in a second edition (Cohen 1885), and his works in the philosophy of science and mathematics: The Principle of the Infinitesimal Method (Cohen 1883), and his introduction to the sixth edition of Lange’s History of Materialism (Cohen  1898).[9]