Library:Karl Marx/Capital, vol. I/Commodities and money/The commodity

The two factors of the commodity: use-value and value (substance of value, magnitude of value)

The wealth of societies in which the capitalist mode of production prevails appears as an ‘immense collection of commodities’; the individual commodity appears as its elementary form. Our investigation therefore begins with the analysis of the commodity.

The commodity is, first of all, an external object, a thing which through its qualities satisfies human needs of whatever kind. The nature of these needs, whether they arise, for example, from the stomach, or the imagination, makes no difference. Nor does it matter here how the thing satisfies man’s need, whether directly as a means of subsistence, i.e. an object of consumption, or indirectly as a means of production.

Every useful thing, for example, iron, paper, etc., may be looked at from the two points of view of quality and quantity. Every useful thing is a whole composed of many properties; it can therefore be useful in various ways. The discovery of these ways and hence of the manifold uses of things is the work of history. So also is the invention of socially recognized standards of measurement for the quantities of these useful objects. The diversity of the measures for commodities arises in part from the diverse nature of the objects to be measured, and in part from convention.

The usefulness of a thing makes it a use-value. But this usefulness does not dangle in mid-air. It is conditioned by the physical properties of the commodity, and has no existence apart from the latter. It is therefore the physical body of the commodity itself, for instance iron, corn, a diamond, which is the use-value or useful thing. This property of a commodity is independent of the amount of labour required to appropriate its useful qualities. When examining use-values, we always assume we are dealing with definite quantities, such as dozens of watches, yards of linen, or tons of iron. The use-values of commodities provide the material for a special branch of knowledge, namely the commercial knowledge of commodities. Use-values are only realized [verwirklicht] in use or in consumption. They constitute the material content of wealth, whatever its social form may be. In the form of society to be considered here they are also the material bearers [Träger] of…exchange-value.

Exchange-value appears first of all as the quantitative relation, the proportion, in which use-values of one kind exchange for use-values of another kind. This relation changes constantly with time and place. Hence exchange-value appears to be something accidental and purely relative, and consequently an intrinsic value, i.e. an exchange-value that is inseparably connected with the commodity, inherent in it, seems a contradiction in terms.

Let us consider the matter more closely.

A given commodity, a quarter of wheat for example, is exchanged for x boot-polish, y silk or z gold, etc. In short, it is exchanged for other commodities in the most diverse proportions. Therefore the wheat has many exchange values instead of one. But x boot-polish, y silk or z gold, etc., each represent the exchange-value of one quarter of wheat. Therefore x boot-polish, y silk, z gold, etc., must, as exchange-values, be mutually replaceable or of identical magnitude. It follows from this that, firstly, the valid exchange-values of a particular commodity express something equal, and secondly, exchange-value cannot be anything other than the mode of expression, the ‘form of appearance’ [Erscheinungsform], of a content distinguishable from it.

Let us now take two commodities, for example corn and iron. Whatever their exchange relation may be, it can always be represented by an equation in which a given quantity of corn is equated to some quantity of iron, for instance 1 quarter of corn = x cwt of iron. What does this equation signify? It signifies that a common element of identical magnitude exists in two different things, in 1 quarter of corn and similarly in x cwt of iron. Both are therefore equal to a third thing, which in itself is neither the one nor the other. Each of them, so far as it is exchange-value, must therefore be reducible to this third thing.

A simple geometrical example will illustrate this. In order to determine and compare the areas of all rectilinear figures we split them up into triangles. Then the triangle itself is reduced to an expression totally different from its visible shape: half the product of the base and the altitude. In the same way the exchange values of commodities must be reduced to a common element, of which they represent a greater or a lesser quantity.

This common element cannot be a geometrical, physical, chemical or other natural property of commodities. Such properties come into consideration only to the extent that they make the commodities useful, i.e. turn them into use-values. But clearly, the exchange relation of commodities is characterized precisely by its abstraction from their use-values. Within the exchange relation, one use-value is worth just as much as another, provided only that it is present in the appropriate quantity. Or, as old Barbon says:

‘One sort of wares are as good as another, if the value be equal. There is no difference or distinction in things of equal value…One hundred pounds worth of lead or iron, is of as great a value as one hundred pounds worth of silver and gold.’

As use-values, commodities differ above all in quality, while as exchange-values they can only differ in quantity, and therefore do not contain an atom of use-value.

If then we disregard the use-value of commodities, only one property remains, that of being products of labour. But even the product of labour has already been transformed in our hands. If we make abstraction from its use-value, we abstract also from the material constituents and forms which make it a use-value. It is no longer a table, a house, a piece of yarn or any other useful thing. All its sensuous characteristics are extinguished. Nor is it any longer the product of the labour of the joiner, the mason or the spinner, or of any other particular kind of productive labour. With the disappearance of the useful character of the products of labour, the useful character of the kinds of labour embodied in them also disappears; this in turn entails the disappearance of the different concrete forms of labour. They can no longer be distinguished, but are all together reduced to the same kind of labour, human labour in the abstract.

Let us now look at the residue of the products of labour. There is nothing left of them in each case but the same phantom-like objectivity; they are merely congealed quantities of homogeneous human labour, i.e. of human labour-power expended without regard to the form of its expenditure. All these things now tell us is that human labour-power has been expended to produce them, human labour is accumulated in them. As crystals of this social substance, which is common to them all, they are values – commodity values [Warenwerte].

We have seen that when commodities are in the relation of exchange, their exchange-value manifests itself as something totally independent of their use-value. But if we abstract from their use-value, there remains their value, as it has just been defined The common factor in the exchange relation, or in the exchange-value of the commodity, is therefore its value. The progress of the investigation will lead us back to exchange-value as the necessary mode of expression, or form of appearance, of value. For the present, however, we must consider the nature of value independently of its form of appearance [Erscheinungsform].

A use-value, or useful article, therefore, has value only because abstract human labour is objectified [vergegenständlicht] or materialized in it How, then, is the magnitude of this value to be measured? By means of the quantity of the ‘value-forming substance’, the labour, contained in the article. This quantity is measured by its duration, and the labour-time is itself measured on the particular scale of hours, days etc.

It might seem that if the value of a commodity is determined by the quantity of labour expended to produce it, it would be the more valuable the more unskilful and lazy the worker who produced it, because he would need more time to complete the article. However, the labour that forms the substance of value is equal human labour, the expenditure of identical human labour-power. The total labour-power of society, which is manifested in the values of the world of commodities, counts here as one homogeneous mass of human labour-power, although composed of innumerable individual units of labour-power. Each of these units is the same as any other, to the extent that it has the character of a socially average unit of labour-power and acts as such, i.e. only needs, in order to produce a commodity, the labour time which is necessary on an average, or in other words is socially necessary. Socially necessary labour-time is the labour-time required to produce any use-value under the conditions of production normal for a given society and with the average degree of skill and intensity of labour prevalent in that society. The introduction of power-looms into England, for example, probably reduced by one half the labour required to convert a given quantity of yarn into woven fabric. In order to do this, the English hand-loom weaver in fact needed the same amount of labour-time as before; but the product of his individual hour of labour now only represented half an hour of social labour, and consequently fell to one half its former value.

What exclusively determines the magnitude of the value of any article is therefore the amount of labour socially necessary, or the labour-time socially necessary for its production. The individual commodity counts here only as an average sample of its kind. Commodities which contain equal quantities of labour, or which can be produced in the same time, have therefore the same value. The value of a commodity is related to the value of any other commodity as the labour-time necessary for the production of the one is related to the labour-time necessary for the production of the other. ‘As exchange-values, all commodities are merely definite quantities of congealed labour-time,’

The value of a commodity would therefore remain constant, if the labour-time required for its production also remained constant. But the latter changes with every variation in the productivity of labour. This is determined by a wide range of circumstances; it is determined amongst other things by the workers’ average degree of skill, the level of development of science and its technological application, the social organization of the process of production, the extent and effectiveness of the means of production, and the conditions found in the natural environment. For example, the same quantity of labour is present in eight bushels of corn in favourable seasons and in only four bushels in unfavourable seasons. The same quantity of labour provides more metal in rich mines than in poor. Diamonds are of very rare occurrence on the earth’s surface, and hence their discovery costs, on an average, a great deal of labour-time. Consequently much labour is represented in a small volume. Jacob questions whether gold has ever been paid for at its full value. This applies still more to diamonds. According to Eschwege, the total produce of the Brazilian diamond mines for the eighty years ending in 1823 still did not amount to the price of 1½ years’ average produce of the sugar and coffee plantations of the same country, although the diamonds represented much more labour, therefore more value. With richer mines, the same quantity of labour would be embodied in more diamonds, and their value would fall. If man succeeded, without much labour, in transforming carbon into diamonds, their value might fall below that of bricks. In general, the greater the productivity of labour, the less the labour-time required to produce an article, the less the mass of labour crystallized in that article, and the less its value. Inversely, the less the productivity of labour, the greater the labour-time necessary to produce an article, and the greater its value. The value of a commodity, therefore, varies directly as the quantity, and inversely as the productivity, of the labour which finds its realization within the commodity. (Now we know the substance of value. It is labour. We know the measure of its magnitude. It is labour-time. The form, which stamps value as exchange-value, remains to be analysed. But before this we need to develop the characteristics we have already found somewhat more fully.)

A thing can be a use-value without being a value. This is the case whenever its utility to man is not mediated through labour. Air, virgin soil, natural meadows, unplanted forests, etc. fall into this category. A thing can be useful, and a product of human labour, without being a commodity. He who satisfies his own need with the product of his own labour admittedly creates use-values, but not commodities. In order to produce the latter, he must not only produce use-values, but use-values for others, social use-values. (And not merely for others. The medieval peasant produced a corn-rent for the feudal lord and a corn-tithe for the priest; but neither the corn-rent nor the corn-tithe became commodities simply by being produced for others. In order to become a commodity, the product must be transferred to the other person, for whom it serves as a use-value, through the medium of exchange.) Finally, nothing can be a value without being an object of utility. If the thing is useless, so is the labour contained in it; the labour does not count as labour, and therefore creates no value.

The dual character of the labour embodied in commodities

Initially the commodity appeared to us as an object with a dual character, possessing both use-value and exchange-value. Later on it was seen that labour, too, has a dual character: in so far as it finds its expression in value, it no longer possesses the same characteristics as when it is the creator of use-values. I was the first to point out and examine critically this twofold nature of the labour contained in commodities. As this point is crucial to an understanding of political economy, it requires further elucidation.

Let us take two commodities, such as a coat and 10 yards of linen, and let the value of the first be twice the value of the second, so that, if 10 yards of linen = W, the coat = 2 W.

The coat is a use-value that satisfies a particular need. A specific kind of productive activity is required to bring it into existence. This activity is determined by its aim, mode of operation, object, means and result. We use the abbreviated expression ‘useful labour’ for labour whose utility is represented by the use-value of its product, or by the fact that its product is a use-value. In this connection we consider only its useful effect.

As the coat and the linen are qualitatively different use-values, so also are the forms of labour through which their existence is mediated – tailoring and weaving. If the use-values were not qualitatively different, hence not the products of qualitatively different forms of useful labour, they would be absolutely incapable of confronting each other as commodities. Coats cannot be exchanged for coats, one use-value cannot be exchanged for another of the same kind.

The totality of heterogeneous use-values or physical commodities reflects a totality of similarly heterogeneous forms of useful labour, which differ in order, genus, species and variety: in short, a social division of labour. This division of labour is a necessary condition for commodity production, although the converse does not hold; commodity production is not a necessary condition for the social division of labour. Labour is socially divided in the primitive Indian community, although the products do not thereby become commodities. Or, to take an example nearer home, labour is systematically divided in every factory, but the workers do not bring about this division by exchanging their individual products. Only the products of mutually independent acts of labour, performed in isolation, can confront each other as commodities.

To sum up, then: the use-value of every commodity contains useful labour, i.e. productive activity of a definite kind, carried on with a definite aim. Use-values cannot confront each other as commodities unless the useful labour contained in them is qualitatively different in each case. In a society whose products generally assume the form of commodities, i.e. in a society of commodity producers, this qualitative difference between the useful forms of labour which are carried on independently and privately by individual producers develops into a complex system, a social division of labour.

It is moreover a matter of indifference whether the coat is worn by the tailor or by his customer. In both cases it acts as a use-value. So, too, the relation between the coat and the labour that produced it is not in itself altered when tailoring becomes a special trade, an independent branch of the social division of labour. Men made clothes for thousands of years, under the compulsion of the need for clothing, without a single man ever becoming a tailor. But the existence of coats, of linen, of every element of material wealth not provided in advance by nature, had always to be mediated through a specific productive activity appropriate to its purpose, a productive activity that assimilated particular natural materials to particular human requirements. Labour, then, as the creator of use-values, as useful labour, is a condition of human existence which is independent of all forms of society; it is an eternal natural necessity which mediates the metabolism between man and nature, and therefore human life itself.

Use-values like coats, linen, etc., in short, the physical bodies of commodities, are combinations of two elements, the material provided by nature, and labour. If we subtract the total amount of useful labour of different kinds which is contained in the coat, the linen, etc., a material substratum is always left. This substratum is furnished by nature without human intervention. When man engages in production, he can only proceed as nature does herself, i.e. he can only change the form of the materials. Furthermore, even in this work of modification he is constantly helped by natural forces. Labour is therefore not the only source of material wealth, i.e. of the use-values it produces. As William Petty says, labour is the father of material wealth, the earth is its mother. *

Let us now pass from the commodity as an object of utility to the value of commodities.

We have assumed that the coat is worth twice as much as the linen. But this is merely a quantitative difference, and does not concern us at the moment. We shall therefore simply bear in mind that if the value of a coat is twice that of 10 yards of linen, 20 yards of linen will have the same value as a coat. As values, the coat and the linen have the same substance, they are the objective expressions of homogeneous labour. But tailoring and weaving are qualitatively different forms of labour. There are, however, states of society in which the same man alternately makes clothes and weaves. In this case, these two different modes of labour are only modifications of the labour of the same individual and not yet fixed functions peculiar to different individuals, just as the coat our tailor makes today, and the pair of trousers he makes tomorrow, require him only to vary his own individual labour. Moreover, we can see at a glance that in our capitalist society a given portion of labour is supplied alternately in the form of tailoring and in the form of weaving, in accordance with changes in the direction of the demand for labour. This change in the form of labour may well not take place without friction, but it must take place.

If we leave aside the determinate quality of productive activity, and therefore the useful character of the labour, what remains is its quality of being an expenditure of human labour-power. Tailoring and weaving, although they are qualitatively different productive activities, are both a productive expenditure of human brains, muscles, nerves, hands etc., and in this sense both human labour. They are merely two different forms of the expenditure of human labour-power. Of course, human labour-power must itself have attained a certain level of development before it can be expended in this or that form. But the value of a commodity represents human labour pure and simple, the expenditure of human labour in general. And just as, in civil society, a general or a banker plays a great part but man as such plays a very mean part, so, here too, the same is true of human labour. It is the expenditure of simple labour-power, i.e. of the labour-power possessed in his bodily organism by every ordinary man, on the average, without being developed in any special way. Simple average labour, it is true, varies in character in different countries and at different cultural epochs, but in a particular society it is given. More complex labour counts only as intensified, or rather multiplied simple labour, so that a smaller quantity of complex labour is considered equal to a larger quantity of simple labour. Experience shows that this reduction is constantly being made. A commodity may be the outcome of the most complicated labour, but through its value it is posited as equal to the product of simple labour, hence it represents only a specific quantity of simple labour. The various proportions in which different kinds of labour are reduced to simple labour as their unit of measurement are established by a social process that goes on behind the backs of the producers; these proportions therefore appear to the producers to have been handed down by tradition. In the interests of simplification, we shall henceforth view every form of labour-power directly as simple labour-power; by this we shall simply be saving ourselves the trouble of making the reduction.

Just as, in viewing the coat and the linen as values, we abstract from their different use-values, so, in the case of the labour represented by those values, do we disregard the difference between its useful forms, tailoring and weaving. The use-values coat and linen are combinations of, on the one hand, productive activity with a definite purpose, and, on the other, cloth and yarn; the values coat and linen, however, are merely congealed quantities of homogeneous labour. In the same way, the labour contained in these values does not count by virtue of its productive relation to cloth and yarn, but only as being an expenditure of human labour-power. Tailoring and weaving are the formative elements in the use-values coat and linen, precisely because these two kinds of labour are of different qualities; but only in so far as abstraction is made from their particular qualities, only in so far as both possess the same quality of being human labour, do tailoring and weaving form the substance of the values of the two articles mentioned.

Coats and linen, however, are not merely values in general, but values of definite magnitude, and, following our assumption, the coat is worth twice as much as the 10 yards of linen. Why is there this difference in value? Because the linen contains only half as much labour as the coat, so that labour-power had to be expended twice as long to produce the second as to produce the first.

While, therefore, with reference to use-value, the labour contained in a commodity counts only qualitatively, with reference to value it counts only quantitatively, once it has been reduced to human labour pure and simple. In the former case it was a matter of the ‘how’ and the ‘what’ of labour, in the latter of the ‘how much’, of the temporal duration of labour. Since the magnitude of the value of a commodity represents nothing but the quantity of labour embodied in it, it follows that all commodities, when taken in certain proportions, must be equal in value.

If the productivity of all the different sorts of useful labour required, let us say, for the production of a coat remains unchanged, the total value of the coats produced will increase along with their quantity. If one coat represents x days’ labour, two coats will represent 2x days’ labour, and so on. But now assume that the duration of the labour necessary for the production of a coat is doubled or halved. In the first case, one coat is worth as much as two coats were before; in the second case two coats are only worth as much as one was before, although in both cases one coat performs the same service, and the useful labour contained in it remains of the same quality. One change has taken place, however: a change in the quantity of labour expended to produce the article.

In itself, an increase in the quantity of use-values constitutes an increase in material wealth. Two coats will clothe two men, one coat will only clothe one man, etc. Nevertheless, an increase in the amount of material wealth may correspond to a simultaneous fall in the magnitude of its value. This contradictory movement arises out of the twofold character of labour. By ‘productivity’ of course, we always mean the productivity of concrete useful labour; in reality this determines only the degree of effectiveness of productive activity directed towards a given purpose within a given period of time. Useful labour becomes, therefore, a more or less abundant source of products in direct proportion as its productivity rises or falls. As against this, however, variations in productivity have no impact whatever on the labour itself represented in value. As productivity is an attribute of labour in its concrete useful form, it naturally ceases to have any bearing on that labour as soon as we abstract from its concrete useful form. The same labour, therefore, performed for the same length of time, always yields the same amount of value, independently of any variations in productivity. But it provides different quantities of use-values during equal periods of time; more, if productivity rises; fewer, if it falls. For this reason, the same change in productivity which increases the fruitfulness of labour, and therefore the amount of use-values produced by it, also brings about a reduction in the value of this increased total amount, if it cuts down the total amount of labour-time necessary to produce the use-values. The converse also holds.

On the one hand, all labour is an expenditure of human labour-power, in the physiological sense, and it is in this quality of being equal, or abstract, human labour that it forms the value of commodities. On the other hand, all labour is an expenditure of human labour-power in a particular form and with a definite aim, and it is in this quality of being concrete useful labour that it produces use-values.