Economics, as is known, was born by fragments, and its origin was associated with that of the first bourgeoisie, which was that of commerce and the great geographical discoveries, that is to say, it was contemporary with the first and second phases of mercantilism. And it was born to answer special questions: for example, is interest legitimate? Is it advantageous for states and for nations to accumulate money? It continued to grow, it occupied itself with the most complex sides of the problem of wealth; it developed in the passage from mercantilism to manufacture and then more rapidly and more resolutely in the passage from the latter to the great industry. It was the intellectual soul of the bourgeoisie which was conquering society. It had already as discipline almost defined its general lines on the eve of the French Revolution; it was the sign of the rebellion against the old forms of feudalism, the guild, privilege, limitations of labor, that is to say it was the sign of liberty. The theory of "natural right" which developed from the precursors of Grotius to Rousseau, Kant, and the Constitution of 93, was nothing else than a duplicate and the ideological complement of economics, to the extent that often the thing and its complement are confounded in one in the mind and in the postulates of writers; of this we have a typical example in the Physiocrats. In so far as it was a doctrine it separated, distinguished and analyzed the elements and the forms of the _processus_ of production, of circulation and of distribution and reduced them all into categories: money, money capital, interest, profit, land rent, wages, etc. It marched, sure of itself, accumulating its analyses from Petty to Ricardo. The sole mistress of the field, it met only rare objections. It started from two hypotheses which it did not take the trouble to justify since they appeared so evident; namely, that the social order which it illustrated was the natural order, and that private property in the means of production was one and the same thing with human liberty; all of which made wage labor and the inferiority of the wage laborers into necessary conditions. In other terms, it did not recognize the historic character of the forms which it studied. The antitheses which it met on its way in its attempt at systematization, after several vain attempts it tried to eliminate logically as was the case with Ricardo in his struggle against the income from land rents.