It results from this, in the third place, that, passing from the underlying economic structure to the picturesque whole of a given history, we need the aid of that complexus of notions and knowledge which may be called, for lack of a better term, social psychology. I do not mean by that to allude to the fantastic existence of a social psyche nor to the concept of an assumed collective spirit which by its own laws, independent of the consciousness of individuals and of their material and definable relations, realizes itself and shows itself in social life. That is pure mysticism. Neither do I wish to allude to those attempts at generalization which fill up treatises on social psychology and the general idea of which is to transport and apply to a subject which is called social consciousness the known categories and forms of individual psychology. Nor again do I wish to allude to that mass of semi-organic and semi-psychological denominations by the aid of which some attribute to the social being, as Schaeffle does, a brain, a spinal column, sensibility, sentiment, conscience, will, etc. But I wish to speak of more modest and more prosaic things, that is to say, of those concrete and precise states of mind which make us know as they really were the plebeians of Rome at a certain epoch, the artisans of Florence at the moment when the movement of the Ciompi burst forth, or those peasants of France within whom was engendered, to follow Taine's expression, the "spontaneous anarchy" of 1789, those peasants who finally became free laborers and small proprietors, or, aspiring to property, transformed themselves rapidly from victors over the foreigner into automatic instruments of reaction. This social psychology, which no one can reduce to abstract canons because, in most cases, it is merely descriptive, this is what the chroniclers, the orators, the artists, the romancers and the ideologists of every sort have seen and up to now have conceived as the exclusive object of their studies. In this, psychology, which is the specific consciousness of men in given social conditions, the agitators, orators and propagandists trust to-day, and to it they appeal. We know that it is the fruit, the outcome, the effect of certain social conditions actually determined;--this class, in this situation, determined by the functions which it fulfills, by the subjection in which it is held, by the dominion which it exercises;--and finally, these classes, these functions, this subjection and this dominion involve such and such a determined form of production and distribution of the immediate means of life, that is to say, a determined economic structure. This social psychology, by its nature always circumstantial, is not the expression of the abstract and generic process of the self-styled human intellect. It is always a specified formation from specified conditions. We hold this principle to be indisputable, that it