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The necessary physical properties of the particular commodity in which the money form of all other commodities is to be crystallized—as far as they are directly determined by the nature of exchange value—are: divisibility to any desired extent, homogeneity of its parts, and uniformity of all the specimens of the commodity. As an embodiment of universal labor-time it must be homogeneous in its structure and capable of representing only quantitative differences. Another necessary property is durability of its use-value, as it must last through the process of exchange. The precious metals excel in these qualities. Money not being a result of a scheme or agreement, but having been produced instinctively in the process of exchange, a great variety of more or less unsuited commodities had successively performed its functions. At a certain stage of development of the process of exchange, the necessity arises for a polar distribution of the functions of exchange value and use-value among commodities, so that one commodity e. g. should act as a medium of exchange, while another is being alienated as a use-value. This necessity brings it about that one or even several commodities possessing the most generally accepted use-value, begin, incidentally at first, to playPg 53 the part of money. Even if not direct means of satisfying existing wants, their being the most considerable material constituent part of wealth, insures to them a more general character than to the other use-values.
Direct barter, the original natural form of exchange, represents rather the beginning of the transformation of use-values into commodities, than that of commodities into money. Exchange value has as yet no form of its own, but is still directly bound up with use-value. This is manifested in two ways. Production, in its entire organization, aims at the creation of use-values and not of exchange values, and it is only when their supply exceeds the measure of consumption that use-values cease to be use-values, and become means of exchange, i. e., commodities. At the same time, they become commodities only within the limits of being direct use-values distributed at opposite poles, so that the commodities to be exchanged by their possessors must be use-values to both,—each commodity to its non-possessor. As a matter of fact, the exchange of commodities originates not within the primitive communities,14 but where they end, on their borders at the few points, where they come in contact with other communities. That is where barter begins, and from here it strikes back into the interior of the community, decomposing it. The various Pg 54use-values which first become commodities in the barter between different communities, such as slaves, cattle, metals, constitute therefore in most cases the first money within those communities themselves. We have seen how the exchange value of a commodity is manifested the more perfectly as exchange value, the longer the series of its equivalents or the greater the sphere of exchange of that commodity. With the gradual expansion of barter, the increase in the number of exchanges, and the growing diversification of the commodities drawn into exchange, commodities develop into exchange values, which leads to the formation of money and has a destructive effect on direct barter. The economists are in the habit of ascribing the origin of money to the difficulties which are encountered in the way of extensive barter, but they forget that these difficulties arise from the development of exchange value and from the fact that social labor becomes universal labor. E. g., commodities as use-values can not be subdivided at will, a property which they should possess as exchange values. Or, a commodity belonging to A may be a use-value to B, while the commodity belonging to B may not have any use-value to A. Or the owners of the commodities may need each other's indivisible goods in unequal proportions. In other words, under the pretence of analyzing simple barter, economists bring out certain aspects of the contradiction which is inherent in commodities as entities simultaneously embodying both use-value and exchange value. On the other hand, they consistently cling to the idea that barter is the natural form of exchange, which suffers only from certain technicalPg 55 difficulties, for which money is a cunningly devised expedient. Arguing from this perfectly superficial view, an ingenious English economist has rightly maintained that money is merely a material instrument like a ship or a steam-engine, but not an expression of a social relation in the field of production and consequently not an economic category; and that it is, therefore, wrong to treat the subject in political economy, which really has nothing in common with technology.15
The world of commodities implies the existence of a highly developed division of labor; this division is manifested directly in the great variety of use-values, which confront each other as particular commodities and which embody as many different kinds of labor. The division of labor embracing all the particular kinds of productive occupations, is the complete expression of social labor in its material aspect viewed as labor creating use-values. But from the standpoint of commodities and within the process of exchange, it exists only in its results, in the variety of the commodities themselves.
The exchange of commodities constitutes the social metabolic process, i. e. the process in which the exchange of the special products of private individuals is the rePg 56sult of certain social relations of production into which the individuals enter in this interchange of matter. As they develop, the mutual relations of commodities crystalize into various aspects of the universal equivalent and thus the process of exchange becomes at the same time the process of the formation of money. The whole of this process which takes the form of a succession of processes, constitutes circulation.
The analysis of commodities according to their twofold aspect of use-value and exchange value by which the former is reduced to work or deliberate productive activity; and the latter, to labor time or homogeneous social labor, is the result of a century and a half of critical study by the classical school of political economy which dates from William Petty in England and Boisguillebert in France16 and closes with Ricardo in the former country and Sismondi in the latter.
Petty reduces use-value to labor, without deceiving himself as to the natural limitation of its creative Pg 57power. As regards concrete labor, he sizes it up in the magnitude of its social aspect, as the division of labor.17 This view of the source of material wealth does not rePg 58main 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 producePg 59 not direct use-values, but commodities or use-values which by means of exchange are capable of assuming the form of gold and silver, i. e. of money, i. e. of exchange value, i. e. of embodiments of universal labor. His example, however, shows strikingly that the recognition of labor as the source of material wealth by no means excludes the misconception of the particular social form in which labor constitutes the source of exchange value.
