Marx's "Misere de la Philosophie" indicates the culmination of the fist phase of his creative work. In this critical review he makes his position clear with respect not only to Proudhon but to Utopian Socialism in general. It marks also the turning point in the studies of Marx: English political economy occupied henceforth the place which German philosophy had held. The anti-Proudhon controversy is therefore worthy of a fuller treatment. Pierre Joseph Proudhon (b. 1809 in Besancon, d. 1865 in Paris) was one of the most gifted and most distinguished of social philosophers which the modern proletariat has produced. He was originally a compositor, like his similarly minded English contemporary, John Francis Bray, the author of "Labour's Wrongs," published in 1839, but he had a much greater inclination for study and a more fruitful literary talent. He managed to acquire, self-taught, a knowledge of the classical languages, of mathematics and of science, read assiduously but indiscriminately works on economics, philosophy, and history, and applied himself to social criticism. It is rare for a working man in the West of Europe to feel impelled to make an acquaintance with Kant, Hegel, and Feuerbach as Proudhon did through French translations and through intercourse with German scholars in Paris. He possessed the noble ambition of blending French sprightliness with German thoroughness. But self-instruction failed to give him that intellectual training which is more valuable than knowledge, and which alone gives the power to order and to utilise the information acquired, as well as to submit one's own work to self-criticism. The value of a systematic education does not consist in the main in the acquisition of knowledge but in the training of our intellectual faculties as instruments of inquiry and apprehension, of methodical thinking and of sound judgment, to enable us to find our bearings more easily in the chaos of phenomena, experiences, and ideas. A self-taught man may no doubt attain to this degree of culture, but only if his first attempts at independent creative work are submitted to a strict but kindly criticism, which makes him discipline his thoughts. This was not the case with Proudhon; he lacked mental self-discipline. His first work, "What is Property?" (1840) brought him immediate recognition and strengthened him in his high opinion of his knowledge and his powers, even to the point of making him conceited. When, for example, the French historian, Michelet, disapproved of his dictum, "Property is robbery," Proudhon replied, "Not twice in a thousand years does one come across a pronouncement like that."--("Economic Contradictions," Leipzig, 1847. Vol. II., p. 301.) And yet the idea is as old as Communism itself. Besides all this, the vivacity and exuberance of language for which Proudhon was noted easily blinded him to the shortcomings of his intellectual culture. Thus it often happened that he rediscovered ideas of his