That ideology, whose criticism has served as an arm and an instrument for giving a juridical form to the economic organization of modern society, has had, consequently, various sources. Yet, in fact, this juridical ideology reflects, in the struggle for law and against law, the revolutionary period of the bourgeois spirit. And, although it takes its doctrinal point of departure in a return to the traditions of the ancient philosophy, in the generalization of Roman jurisprudence, in everything else, and in all its development, it is completely new and modern. Roman law, although it was generalized by scholasticism and by modern elaboration, still remains within itself a collection of special cases which have not been deduced according to a preconceived system, nor preordained by the systematic mind of the legislator. On the other hand, the rationalism of the stoics, their contemporaries and their disciples, was a work of pure contemplation, and it produced no revolutionary movement around it. The ideology of natural law, which finally took the name of philosophy of law, was, on the contrary, systematic, it started always from general formulae, it was aggressive and polemic, and still more, it was at war with orthodoxy, with intolerance, with privilege, with constituted bodies; in fine, it fought for the liberties which to-day constitute the formal conditions of modern society. It is with this ideology, which was a method of struggle, that arose for the first time, in a typical and decisive form, that idea that there is a law which is one and the same with reason. The laws against which the struggle was carried on appear as deviations, backward steps, errors.

From this faith in rational law arose the blind belief in the power of the legislator, which grew into fanaticism at the critical moments of the French Revolution.

Thence the belief that society as a whole is to be submitted to one single law, equal for all, systematic, logical, consistent. Thence the conviction that a law guaranteeing to all a legal equality, that is to say, the privilege of contracting, guaranteed also liberty to all.

The triumph of true law assures the triumph of reason, and the society which is regulated by a law equal for all is a perfect society!

It is useless to say that there were illusions at the bottom of these tendencies. We all know to what this universal liberation of men was to lead. But what is most important here is the fact that these persuasions arose from a conception of law, which considered it as detached from the social causes which produced it. Likewise that reason, to which these ideologies appealed, reduced itself to relieving labor, association, traffic, commerce, political forms and conscience from all limits and all obstacles which prevented free competition. I have already shown in another chapter how the great Revolution of the eighteenth century may serve us for experience. And if there is still some one to-day who insists on speaking of a rational law which dominates history, of a law, in short, which would be a factor, instead of being a simple fact in historic revolution, that means that he is living out of our time and that he has not understood that our liberal and equalitarian codification has already, in fact, marked the end and the term of that whole school of natural law.

By different ways we have arrived in this century at reducing law, considered previously as a rational thing, into a material thing, and thus into a thing corresponding to definite social conditions.

In the first place, the interest in history gained in extent and in depth, and it led students to recognize that to understand the origins of law, it was not sufficient to stop at the data of pure reason, nor at the study of Roman law alone. Barbaric laws, the usages and customs of nations and societies, so despised by the rationalists, have been theoretically restored to honor. That was the only way to arrive, through the study of the most ancient forms, at an understanding of how the most recent forms could have been successively produced.

Codified Roman law is a very modern form; that personality, which it assumes as a universal subject, is an elaboration of a very advanced epoch, in which the cosmopolitanism of social relations was dominated by a military-bureaucratic constitution. In this environment, in which a written code of reason had been built up, there was no longer any trace of spontaneity or popular life, there was no more democracy. This same law, before arriving at this crystallization, had arisen and had developed: and if we study it in its origins and in its developments, and especially if, in this study, we employ the comparative method, we recognize that, upon many points, it is analogous to the institutions of inferior societies and nations. It therefore becomes evident that the true science of law can be nothing less than the genetic history of the law itself.

But, while the European continent had created in the codification of civil law the type and the textbook of practical bourgeois judgment, was there not in England another self-originating form of law, which arose and developed in a purely practical manner, from the very conditions of the society which produced it without system, and without the action of methodical rationalism having any part in it? The law, which actually exists and is applied, is therefore a much simpler and much more modest thing than was imagined by the enthusiasts who sing the praises of written judgment, of the empire of reason. For their defense, it must not be forgotten that they were the ideal precursors of the great Revolution. For ideology it was necessary to substitute the history of legal institutions. The philosophy of law ended with Hegel; and if objectors mention the books published since, I reply that the works published by professors are not always the index of the progress of thought. The philosophy of law thus became the philosophical study of the history of law. And it is not necessary to repeat here again how historic philosophy ended in economic materialism and in what sense critical communism is the reversal of Hegel.

This revolution, apparently a revolution in ideas alone, is merely an intellectual reflection of the revolutions which have been produced in practical life.