It was to be expected, with the extension of exact methods of investigation to other fields of knowledge, that the study of man and of society would become, or seek to become, scientific in the sense in which that word is used in the natural sciences. It is interesting, in this connection, that Comte's first name for sociology was _social physics_. It was not until he had reached the fourth volume of his _Positive Philosophy_ that the word sociological is used for the first time. Comte, if he was foremost, was not first in the search for a positive science of society, which would give man that control over men that he had over external nature. Montesquieu, in his _The Spirit of Laws_, first published in 1747, had distinguished in the organization of society, between form, "the particular structure," and the forces, "the human passions which set it in motion." In his preface to this first epoch-making essay in what Freeman calls "comparative politics," Montesquieu suggests that the uniformities, which he discovered beneath the wide variety of positive law, were contributions not merely to a science of law, but to a science of mankind. I have first of all considered mankind; and the result of my thoughts has been, that amidst such an infinite diversity of laws and manners, they are not solely conducted by the caprice of fancy.[5] Hume, likewise, put politics among the natural sciences.[6] Condorcet wanted to make history positive.[7] But there were, in the period between 1815 and 1840 in France, conditions which made the need of a new science of politics peculiarly urgent. The Revolution had failed and the political philosophy, which had directed and justified it, was bankrupt. France, between 1789 and 1815, had adopted, tried, and rejected no less than ten different constitutions. But during this period, as Saint-Simon noted, society, and the human beings who compose society, had not changed. It was evident that government was not, in any such sense as the philosophers had assumed, a mere artefact and legislative construction. Civilization, as Saint-Simon conceived it, was a part of nature. Social change was part of the whole cosmic process. He proposed, therefore, to make politics a science as positive as physics. The subject-matter of political science, as he conceived it, was not so much political forms as social conditions. History had been literature. It was destined to become a science.[8]