Page:Contribution to the Critique of Political Economy, A - Karl Marx.djvu/64

Rh more or less fruitless as in the case of his contemporary, Hobbes, but leads up to his Political Arithmetic, the first form in which Political Economy is differentiated as an independent science.

He defines exchange value, however, just as it appears in the process of exchange of commodities, viz. as money; and money he defines as an existing commodity, gold and silver. Laboring under the ideas of the monetary system, he declares the special branch of labor which is devoted to the production of gold and silver as the labor which determines exchange value. What he really means is that the labor of members of society must