The true problem consists, indeed, not in substituting sociology for history, as if the latter had been an appearance which conceals behind it a secret reality, but in understanding history as a whole, in all its intuitive manifestations, and in understanding it through the aid of economic sociology. It is not a question of separating the accident from the substance, the appearance from the reality, the phenomenon from the intrinsic kernel, or applying any other formula used by the partisans of any species of scholasticism, but of explaining the connection and the _complexus_ precisely in so far as it is a connection and a _complexus_. It is not merely a question of discovering and determining the social groundwork, and then of making men appear upon it like so many marionettes, whose threads are held and moved, no longer by Providence but by economic categories. These categories have themselves developed and are developing, like all the rest--because men change as to the capacity and the art of vanquishing, subduing, transforming and utilizing natural conditions; because men change in spirit and attitude through the reaction of their tools upon themselves; because men change in their respective and co-associated relations; and therefore as individuals depending in various degrees upon one another. We have, in fine, to do with history, and not with its skeleton. We are dealing with narration and not with abstraction, with the explaining and treating of the whole, and not merely with resolving and analyzing it; we have to do, in a word, now, as always, with an art. It may be that the sociologist who follows the principles of economic materialism proposes to keep himself simply to the analysis, for example, of what the classes were at the moment when the French Revolution broke out, and to pass then to the classes that result from the Revolution and survive it. In that case the titles, the indications and the classifications of the materials to analyze are definite; they are, for example, the city and the country, the artisan and the laborer, the nobles and the serfs, the land which is freed from feudal charges, and the small proprietors who came into being, commerce which frees itself from so many restrictions, money which accumulates, industry which prospers, etc. There is nothing to object to in the choice of this method, which, because it follows the track of embryonic origins, was indispensable to the preparation of historical research according to the direction of the new doctrine.[29]