After different forms of concrete labor, such as agriculture, manufacture, navigation, trade, etc., had each in turn been declared the true source of wealth, Adam Smith proclaimed labor in general, and namely in its general social form of division of labor, to be the only source of material wealth or use-values. While ignoring in connection with the latter the part played by nature, he is troubled by it when he comes to deal with purely social wealth i. e. exchange value. To be sure, Adam determines the value of a commodity by the labor-time contained in it, but relegates the actual application of the principle to pre-Adamic times. In other words, what seems to him true from the standpoint of simple commodity, ceases to be clear as soon as the higher and more complex forms of capital, wage-labor, rent, etc. take its place. This he expresses by saying, that the value of commodities used to be measured by labor-time in the paradise lost of bourgeois society, in which men dealt with each other not as capitalists, wage-workers, landlords, tenants, usurers, etc., but merely as plain producers of commodities which they exchanged. He constantly confuses the determination of the value of commodities by the labor-time contained in them with the determination of their value by the value of labor. He becomes confused in working out the details and fails to see the objective equalization of different kinds of labor which the social process forcibly carries out, mistaking it for the subjective equality of the labors of individuals.33 The transition from concrete labor to labor creating exchange value, i. e. to labor in its fundamental capitalistic form he tries to derive from the division of labor. Yet, while it is true that private exchange implies the division of labor, it is false to maintain that division of labor implies private exchange. Among the Peruvians, e. g., labor was divided to an extraordinary extent, although there was no private exchange, no exchange of products, as commodities.
Contrary to Adam Smith, David Ricardo elaborated with great clearness the determination of the value of a commodity by labor-time and showed that this law governs also such relations of capitalistic