Yet into this complexus he must introduce a certain degree of analysis, resolving it into groups and into aspects of facts, or into concurrent elements, which afterwards appear at a certain moment as independent categories. It is the state in a certain form and with certain powers; it is the laws, which determine, by what they command or what they prohibit, certain relations; it is the manners and customs which reveal to us tendencies, needs, ways of thinking, of believing, of imagining; altogether it is a multitude of men living and working together, with a certain distribution of tasks and occupations; he observes then the thoughts, the ideas, the inclinations, the passions, the desires, the aspirations which arise and develop from this varied mode of coexistence and from its frictions. Let a change be produced, and it will show itself in one of the sides or one of the aspects of the empirical complexus, or in all of these within a longer or a shorter time; for example, the state extends its boundaries, or changes its internal limits as regards society by increasing or diminishing its powers and its attributes, or by changing the mode of action of one or the other; or, again, the law modifies its dispositions, or it expresses and affirms itself through new organs; or, again, finally, behind the change of exterior and daily habits, we discover a change in the sentiments, the thoughts and the inclinations of the men variously distributed in the different social classes, who mingle, change, replace each other, disappear or reappear. All this may be sufficiently understood, in its exterior forms and outlines, through the usual endowments of normal intelligence which is not yet aided, corrected or completed by science strictly so-called. Assembling within precise limits a conception of such facts is the true and proper object of narration, which is so much the clearer, more vivid and more exact, as it takes the form of a monograph; witness Thucydides in the Peloponnesian war.

Society already evolved in a certain fashion, society already arrived at a certain degree of development, society already so complicated that it conceals the economic substructure which supports all the rest, has not revealed itself to the simple narrators, except in these visible facts, in these most apparent results, and in these most significant symptoms which are the political forms, the legal dispositions and the partisan passions. The narrator, both because he lacks any theoretical doctrine regarding the true sources of the historic movement, and by the very attitude which he takes on the subject of the things which he unites according to the appearances which they have come to assume, cannot reduce them to unity, unless it be as a result of a single, immediate intuition, and if he is an artist, this intuition takes on a color in his mind and transforms itself there into dramatic action. His task is finished if he succeeds in massing a certain number of facts and events in certain limits and confines over which the observer may look as on a clear perspective; in the same way, purely descriptive geography has accomplished its task, if it sums up in a vivid and clear design a concourse of physical causes which determine the immediate aspect of the Gulf of Naples, for example, without going back to its genesis.

It is in this need of graphic narration that arises the first intuitive, palpable, and, I might almost say, æsthetic and artistic occasion for all those abstractions and those generalizations, which are finally summed up in the semi-doctrine of the so-called factors.

Here are two notable men, the Gracchi, who wished to put an end to the process of appropriation of the public land and to prevent the agglomeration of the latifundium, which was diminishing or causing to completely disappear the class of small proprietors, that is to say, of the free men, who are the foundation and the condition of the democratic life of the ancient city. What were the causes of their failure? Their aim is clear, their spirit, their origin, their character, their heroism are manifest. They have against them other men with other interests and with other designs. The struggle appears to the mind at first merely as a struggle of intentions and passions, which unfolds and comes to an end by the aid of means which are permitted by the political form of the state and by the use or abuse or the public powers. Here is the situation: the city ruling in different manners over other cities or over territories which have lost all character of autonomy; within this city a very decided differentiation between rich and poor; and facing the comparatively small group of the oppressors and the all-powerful, stands the immense mass of the proletarians, who are on the point of losing or who have already lost the consciousness and the political strength of a body of citizens, the mass which therefore suffers itself to be deceived and corrupted, and which will soon decay till it is but a servile accessory to its aristocratic exploiters. There is the material of the narrator, and he cannot take account of the fact otherwise than in the immediate conditions of the fact itself. The complete whole is directly seen and forms the stage on which the events unfold, but if the narration is to have solidity, vividness and perspective there must be points of departure and ways of interpretation.

In this consists the first origin of those abstractions, which little by little take away from the different parts of a given social complexus their quality of simple sides or aspects of a whole, and it is their ensuing generalization which little by little leads to the doctrine of factors.

These factors, to express it in another way, arise in the mind as a sequence of the abstraction and generalization of the immediate aspects of the apparent movement, and they have an equal value with that of all other empirical concepts. Whatever be the domain of knowledge in which they arise, they persist until they are reduced and eliminated by a new experience, or until they are absorbed by a conception more general, genetic, evolutionary or dialectic. Was it not necessary that in the empirical analysis and in the immediate study of the causes and the effects of certain definite phenomena, for example the phenomena of heat, the mind should first stop at this presumption and this persuasion, that it could and should attribute them to a subject, which if it was never for any physicist a true and substantial entity, was certainly considered as a definite and specific force, namely, heat. Now we see that at a given moment, as a result of new experiences, this heat is resolved in given conditions into a certain quantity of motion. Still further, our thought is now on the way toward resolving all these physical factors into the flux of one universal energy, in which the hypotheses of the atoms, in the extent to which it is necessary, loses all residue of metaphysical survival.

Was it not inevitable, as a first step of knowledge in what concerns the problem of life, to spend a considerable time in the separate study of the organs and to reduce them to systems? Without this anatomy, which seems too material and too gross, no progress in these studies would have been possible; and nevertheless, above the unknown genesis and co-ordination of such an analytic multiplicity, there were evolving, uncertain and vague, the generic conceptions of life, soul, etc. In these mental creations have long been seen that biological unity which has finally found its object in the certain beginning of the cell and in its processus of immanent multiplication.

More difficult certainly was the way which the thought had to traverse to reconstruct the genesis of all the facts of psychic life, from the most elementary successions up to the most complex derived products. Not only for reasons of theoretical difficulties, but in consequence of popular prejudices, the unity and continuity of psychic phenomena appeared, up to the time of Herbart, as separated and divided into so many factors, faculties of the soul.

The interpretation of the historico-social processus met the same difficulties; it also was obliged to stop at first in the provisional view of factors. And that being so, it is easy for us now to find again the first origin of that opinion in the necessity that the historians have of finding in the facts that they relate with more or less artistic talent and in different professional views, certain points of immediate orientation, such as may be offered by the study of the apparent movement of human events.

But in this apparent movement, there are the elements of a more exact view. These concurrent factors, which abstract thought conceives and then isolates, have never been seen acting each for itself. On the contrary, they act in such a manner that it gives birth to the concept of reciprocal action. Moreover, these factors themselves arise at a given moment, and it is not until later that they acquired that physiognomy which they have in the particular narration. This State, it is well known, arose at a given moment. As for every rule of law, it may either be remembered or conjectured that it went into effect under such or such circumstances. As for many customs, it may be remembered that they were introduced at a given moment; and the simplest comparisons of the facts in different times or different places would show how society, as a whole, and in its character of being an aggregation of different classes, had taken and took continuously various forms.