"My masters," said Proudhon to his friend Langlois in the year 1848, "that is those who woke fruitful ideas in me, are three: first of all, the Bible, then Adam Smith, and finally Hegel." Proudhon always boasted of being Hegel's pupil, and Karl Marx maintained that it was he who, during his stay in Paris in the year 1844, in debates which often lasted all night long, inoculated Proudhon (to the latter's great disadvantage) with Hegelianism, which he nevertheless could not properly study owing to his ignorance of the German language. A well-known anecdote attributes to Hegel the witty saying that only one scholar understood him and he misunderstood him. We do not know who this scholar was, but it might just as well have been Marx as Proudhon, for that which both of them took from the great philosopher, and applied as and how and when they did, is common to both: namely, the dialectic method applied to the problems of social philosophy. The similarity between them in this respect is so striking that one might call both these embittered opponents the personal antitheses of the great master, Hegel. As for the rest, Proudhon's inoculation with Hegelianism, which was afterwards continued by K. Gruen and Bakunin, must have been very marked and continuous, for we shall constantly be meeting with traces of it as we go on. Powerful as was the influence of Hegel upon Proudhon, the Anarchist was but little affected by the fashionable philosophy of his contemporary and fellow-countryman, A. Comte; which is all the more remarkable since it is Comte's Positivism which, proceeding along the lines of Spencer's philosophy, has in no small degree influenced modern Anarchism, while echoes of the Comtian individualist doctrine are even to be found in the German contemporary of Proudhon, Stirner; echoes which, although numerous, are perhaps unconscious. Proudhon attached himself, as already mentioned, specially to the Hegelian dialectic and to the doctrine of Antitheses. Using this criterion, Proudhon proceeded to the consideration and criticism of social phenomena; and just as beginners and pupils in the difficult art of philosophy, instead of contenting themselves with preliminary questions, attack the very kernel of problems, with all the rashness of ignorance, so Proudhon also attacked, as his first problem, the fundamental social question of property, taking it up for the subject of his much-quoted though much less read work, _What is Property?_ (_Qu'est-ce que la Propriete?_--First essay in _Recherches sur le Principe du Droit et du Gouvernement_). Proudhon has been judged and condemned, though, and wrongly, yet almost exclusively, by this one essay, written at the beginning of his literary career. Friends and foes alike have always contented themselves with regarding the celebrated dictum there uttered, Property is Theft, as the Alpha and the Omega of Proudhon's teaching, without reading the book itself.