its form, composition, individuality; it is its vital substance quantitatively, having at the same time its own inherent measure. Labor-time embodied in the use-values of commodities is the substance which makes exchange values and, therefore, commodities of them and at the same time serves to measure definite quantities of their value. Corresponding quantities of different use-values, in which the same quantity of labor-time is embodied, are equivalents; or, to put it in another form, all use-values are equivalents when taken in proportions containing the same quantity of expended, materialized labor-time. As exchange values, all commodities are but definite measures of congealed labor-time.
To understand how exchange value is determined by labor-time, the following main points must be kept in mind: The reduction of labor to simple labor, devoid of any quality, so to speak; the specific ways and means by which exchange—value-creating, i.e., commodity producing labor becomes social labor; finally, the difference between labor as the producer of use-values, and labor as the creator of exchange values.
In order to measure commodities by the labor-time contained in them, the different kinds of labor must be reduced to uniform, homogeneous, simple labor, in short, to labor which is qualitatively the same, and, therefore, differs only in quantity.
This reduction appears to be an abstraction; but it is an abstraction which takes place daily in the social process of production. The conversion of all commodities into labor-time is no greater abstraction nor a less real process than the chemical reduction of all organic bodies to air. Labor, thus measured by time, does not appear in reality as the labor of different individuals. but on the contrary, the various working individuals rather appear as mere organs of labor; or, in so far as labor is represented by exchange values, it may be defined as human labor in general. This abstraction of human labor in general virtually exists in the average labor which the average individual of a given society can perform—a certain productive expenditure of human muscles, nerves, brain, etc. It is unskilled labor to which the average individual can be put and which he has to perform in one way or another. The character of this average labor varies in different countries and at different stages of civilization, but appears fixed in a particular society. Unskilled labor constitutes the bulk of all labor performed in capitalist society, as may be seen from all statistics.
It is obvious that if A spends six hours in the production of iron and six hours on linen, and B also produces iron during six hours and linen during another six hours, it is but a different application of the same labor time that would be expended, if A produced iron during twelve hours, while B worked twelve hours on linen. But how about skilled labor which rises above the level of average labor by its higher intensity, by its greater specific gravity? This kind of labor resolves itself into unskilled labor composing it; it is simple labor of a higher intensity, so that one day of skilled labor, e.g., may equal three days of unskilled labor. This is not the place to consider the laws regulating this reduction. It is clear, however, that such reduction does take place, for, as exchange value, the product of the most skilled labor is, when taken in a certain proportion, equivalent to the product of unskilled average labor, or equal to a definite quantity of that unskilled labor.
The determination of exchange-value by means of labor-time implies, further, the fact that an equal quantity of labor is embodied in any given commodity, e.g., a ton of iron, no matter whether it is the work of A or B, that is to say, various individuals expend an equal amount of labor-time for the production of the same use-value of a given quality and quantity. It is thus assumed that the labor-time contained in a commodity is the labor-time necessary for its production, i.e., it is the labor-time which is required for the production of another specimen of the same commodity under the same general conditions of production.
The conditions of labor, which creates exchange value, as shown by the analysis of the latter, are social conditions of labor or conditions of social labor. Social, not in the ordinary, but in a special sense. It is a specific form of the social process. The homogeneous simplicity of labor means first of all equality of the labors of various individuals, a reciprocal relation of equality of their labors determined by the actual reduction of all kinds of labor to uniform labor. The labor of every individual, as far as it is expressed in exchange value possesses this social character of equality and finds expression in exchange value only in so far as it is a relation of equality with the labor of all other individuals.
Furthermore, the labor-time of a single individual is directly expressed in exchange value as universal labor-time, and this universal character of individual labor is the manifestation of its social character. The labor-time represented by exchange value is the labor-time of an individual, but of an individual undistinguished from other individuals in so far as they perform the same labor; therefore, the time required by one individual for the production of a certain commodity is the necessary labor-time which any other individual would have to spend on the production of the same commodity. It is the labor-time of an individual, his labor-time, but only as labor-time common to all, regardless as to which particular individual’s labor-time it is. As universal labor-time it is represented in a universal product, in a universal equivalent, in a definite quantity of materialized labor-time: the latter is indifferent as to the particular form of use-value in which it appears directly as the product of an individual, and may be turned at will into any other form of use-value to represent the product of any other individual. Only as such a universal quantity, is it a social quantity. In order to result in exchange value, the labor of an individual must be turned into a universal equivalent, i.e., the labor-time of an individual must be expressed as universal labor-time, or universal labor-time as that of an individual. It is the same as though different individuals had put together their labor-time and contributed the different quantities of labor-time at their common disposal in the form of different use-values. The labor-time of the individual is thus, in fact, the labor time which society requires for the production of a certain use-value, i.e., for the satisfaction of a certain want. But the question that interests us here is as to the specific form in which labor acquires a social character. Let us suppose that a certain quantity of labor-time of a spinner is realized in 100 lbs. of yarn. Suppose 100 yards of linen, the product of the weaver, represent the same quantity of labor-time. Inasmuch as these two products represent equal quantities of universal labor-time and, hence, are equivalents of every use-value which contains the same amount of labor-time, they are also equivalent to each other. Only because the labor-time of the spinner and that of the weaver take the form of universal labor-time and their products appear as universal equivalents, is the labor of the weaver realized for the spinner, and that of the spinner, for the weaver, the labor of one takes the place of the labor of the other, i.e., the social character of their labors is realized for both. Quite different it was under the patriarchal system of production, when spinner and weaver lived under the same roof, when the female members of the family did the spinning, and the male members did the weaving to supply the wants of their own family; then yarn and linen were social products, spinning and weaving were social labor within the limits of the family. But their social character did not manifest itself in the fact that yarn, as a universal equivalent, could be exchanged for linen as a universal equivalent, or that one was exchanged for another, as identical and equivalent expressions of the same universal labor-time. It was rather the family organization with its natural division of labor that impressed its peculiar social stamp on the product of labor. Or, let us take the services and payments in kind of the Middle Ages. It was the specific kind of labor performed by each individual in its natural form, the particular and not the universal aspect of labor, that constituted then the social tie. Or, let us finally take labor carried on in common in its primitive natural form, as we find it at the dawn of history of all civilized races.4 It is clear that in this case labor does not acquire its social character from the fact that the labor of the individual takes on the abstract form of universal labor or that his product assumes the form of a universal equivalent. The very nature of production under a communal system makes it impossible for the labor of the individual to be private labor and his product to be a private product; on the contrary, it makes individual labor appear as the direct function of a member of a social organism. On the contrary, labor, which is expressed in exchange value, at once appears as the labor of a separate individual. It becomes social labor only by taking on the form of its direct opposite, the form of abstract universal labor.