«Part II: The Transformation of Money in Capital Ch. 4: The General Formula for Capital Ch. 5: Contradictions in the General Formula of Capital Ch. 6: ...»
To accumulate it is necessary to convert a portion of the surplus-product into capital. But we cannot, except by a miracle, convert into capital anything but such articles as can be employed in the labour-process (i.e., means of production), and such further articles as are suitable for the sustenance of the labourer (i.e., means of subsistence). Consequently, a part of the annual surplus-labour must have been applied to the production of additional means of production and subsistence, over and above the quantity of these things required to replace the capital advanced. In one word, surplus-value is convertible into capital solely because the surplus-product, whose value it is, already comprises the material elements of new capital.  Now in order to allow of these elements actually functioning as capital, the capitalist class requires additional labour. If the exploitation of the labourers already employed do not increase, either extensively or intensively, then additional labour-power must be found. For this the mechanism of capitalist production provides beforehand, by converting the working-class into a class dependent on wages, a class whose ordinary wages suffice, not only for its maintenance, but for its increase.
We here leave out of consideration the portion of the surplus-value consumed by the capitalist. Just as little does it concern us, for the moment, whether the additional capital is joined on to the original capital, or is separated from it to function independently;
whether the same capitalist, who accumulated it, employs it, or whether he hands it over to another. This only we must not forget, that by the side of the newly-formed capital, the original capital continues to reproduce itself, and to produce surplus-value, and that this is also true of all accumulated capital, and the additional capital engendered by it.
The original capital was formed by the advance of £10,000. How did the owner become possessed of it? "By his own labour and that of his forefathers," answer unanimously the spokesmen of Political Economy.  And, in fact, their supposition appears the only one consonant with the laws of the production of commodities.
But it is quite otherwise with regard to the additional capital of £2,000. How that originated we know perfectly well. There is not one single atom of its value that does not owe its existence to unpaid labour. The means of production, with which the additional labour-power is incorporated, as well as the necessaries with which the labourers are sustained, are nothing but component parts of the surplus-product, of the tribute annually exacted from the working-class by the capitalist class. Though the latter with a portion of that tribute purchases the additional labour-power even at its full price, so that equivalent is exchanged for equivalent, yet the transaction is for all that only the old dodge of every conqueror who buys commodities from the conquered with the money he has robbed them of.
If the additional capital employs the person who produced it, this producer must not only continue to augment the value of the original capital, but must buy back the fruits of his previous labour with more labour than they cost. When viewed as a transaction between the capitalist class and the working-class, it makes no difference that additional labourers are employed by means of the unpaid labour of the previously employed labourers. The capitalist may even convert the additional capital into a machine that throws the producers of that capital out of work, and that replaces them by a few children. In every case the working-class creates by the surplus-labour of one year the capital destined to employ additional labour in the following year.  And this is what is called: creating capital out of capital.
The accumulation of the first additional capital of £2,000 pre-supposes a value of £10,000 belonging to the capitalist by virtue of his "primitive labour," and advanced by him. The second additional capital of £400 pre-supposes, on the contrary, only the previous accumulation of the £2,000, of which the £400 is the surplus-value capitalised.
The ownership of past unpaid labour is thenceforth the sole condition for the appropriation of living unpaid labour on a constantly increasing scale. The more the capitalist has accumulated, the more is he able to accumulate.
In so far as the surplus-value, of which the additional capital, No. 1, consists, is the result of the purchase of labour-power with part of the original capital, a purchase that conformed to the laws of the exchange of commodities, and that, from a legal standpoint, pre-supposes nothing beyond the free disposal, on the part of the labourer, of his own capacities, and on the part of the owner of money or commodities, of the values that belong to him; in so far as the additional capital, No. 2, &c., is the mere result of No. 1, and, therefore, a consequence of the above conditions; in so far as each single transaction invariably conforms to the laws of the exchange of commodities, the capitalist buying labour-power, the labourer selling it, and we will assume at its real value; in so far as all this is true, it is evident that the laws of appropriation or of private property, laws that are based on the production and circulation of commodities, become by their own inner and inexorable dialectic changed into their very opposite. The exchange of equivalents, the original operation with which we started, has now become turned round in such a way that there is only an apparent exchange. This is owing to the fact, first, that the capital which is exchanged for labour-power is itself but a portion of the product of others' labour appropriated without an equivalent; and, secondly, that this capital must not only be replaced by its producer, but replaced together with an added surplus. The relation of exchange subsisting between capitalist and labourer becomes a mere semblance appertaining to the process of circulation, a mere form, foreign to the real nature of the transaction, and only mystifying it. The ever repeated purchase and sale of labour-power is now the mere form; what really takes place is this — the capitalist again and again appropriates, without equivalent, a portion of the previously materialised labour of others, and exchanges it for a greater quantity of living labour. At first the rights of property seemed to us to be based on a man's own labour. At least, some such assumption was necessary since only commodity-owners with equal rights confronted each other, and the sole means by which a man could become possessed of the commodities of others, was by alienating his own commodities; and these could be replaced by labour alone. Now, however, property turns out to be the right, on the part of the capitalist, to appropriate the unpaid labour of others or its product, and to be the impossibility, on the part of the labourer, of appropriating his own product. The separation of property from labour has become the necessary consequence of a law that apparently originated in their identity.
 Therefore,  however much the capitalist mode of appropriation may seem to fly in the face of the original laws of commodity production, it nevertheless arises, not from a violation, but, on the contrary, from the application of these laws. Let us make this clear once more by briefly reviewing the consecutive phases of motion whose culminating point is capitalist accumulation.
We saw, in the first place, that the original conversion of a sum of values into capital was achieved in complete accordance with the laws of exchange. One party to the contract sells his labour-power, the other buys it. The former receives the value of his commodity, whose use-value — labour — is thereby alienated to the buyer. Means of production which already belong to the latter are then transformed by him, with the aid of labour equally belonging to him, into a new product which is likewise lawfully his.
The value of this product includes: first, the value of the used-up means of production.
Useful labour cannot consume these means of production without transferring their value to the new product, but, to be saleable, labour-power must be capable of supplying useful labour in the branch of industry in which it is to be employed.
The value of the new product further includes: the equivalent of the value of the labour-power together with a surplus-value. This is so because the value of the labour-power — sold for a definite length of time, say a day, a week, etc. — is less than the value created by its use during that time. But the worker has received payment for the exchange-value of his labour-power and by so doing has alienated its use-value — this being the case in every sale and purchase.
The fact that this particular commodity, labour-power, possesses the peculiar use-value of supplying labour, and therefore of creating value, cannot affect the general law of commodity production. If, therefore, the magnitude of value advanced in wages is not merely found again in the product, but is found there augmented by a surplus-value, this is not because the seller has been defrauded, for he has really received the value of his commodity; it is due solely to the fact that this commodity has been used up by the buyer.
The law of exchange requires equality only between the exchange-values of the commodities given in exchange for one another. From the very outset it pre-supposes even a difference between their use-values and it has nothing whatever to do with their consumption, which only begins after the deal is closed and executed.
Thus the original conversion of money into capital is achieved in the most exact accordance with the economic laws of commodity production and with the right of
property derived from them. Nevertheless, its result is:
(1) that the product belongs to the capitalist and not to the worker;
(2) that the value of this product includes, besides the value of the capital advanced, a surplus-value which costs the worker labour but the capitalist nothing, and which none the less becomes the legitimate property of the capitalist;
(3) that the worker has retained his labour-power and can sell it anew if he can find a buyer.
Simple reproduction is only the periodical repetition of this first operation; each time money is converted afresh into capital. Thus the law is not broken; on the contrary, it is merely enabled to operate continuously. "Several successive acts of exchange have only made the last represent the first" (Sismondi, "Nouveaux Principes, etc.," p. 70).
And yet we have seen that simple reproduction suffices to stamp this first operation, in so far as it is conceived as an isolated process, with a totally changed character. "Of those who share the national income among themselves, the one side (the workers) acquire every year a fresh right to their share by fresh work; the others (the capitalists) have already acquired, by work done originally, a permanent right to their share" (Sismondi, l.
c., pp. 110, 111). It is indeed notorious that the sphere of labour is not the only one in which primogeniture works miracles.
Nor does it matter if simple reproduction is replaced by reproduction on an extended scale, by accumulation. In the former case the capitalist squanders the whole surplus-value in dissipation, in the latter he demonstrates his bourgeois virtue by consuming only a portion of it and converting the rest into money.
The surplus-value is his property; it, has never belonged to anyone else. If he advances it for the purposes of production, the advances made come from his own funds, exactly as on the day when he first entered the market. The fact that on this occasion the funds are derived from the unpaid labour of his workers makes absolutely no difference. If worker B is paid out of the surplus-value which worker A produced, then, in the first place, A furnished that surplus-value without having the just price of his commodity cut by a half-penny, and, in the second place, the transaction is no concern of B's whatever. What B claims, and has a right to claim, is that the capitalist should pay him the value of his labour-power. "Both were still gainers: the worker because he was advanced the fruits of his labour" (should read: of the unpaid labour of other workers) "before the work was done" (should read: before his own labour had borne fruit); "the employer (le maître),
because the labour of this worker was worth more than his wages" (should read:
produced more value than the value of his wages). (Sismondi, l. c., p. 135.) To be sure, the matter looks quite different if we consider capitalist production in the uninterrupted flow of its renewal, and if, in place of the individual capitalist and the individual worker, we view in their totality, the capitalist class and the working-class confronting each other. But in so doing we should be applying standards entirely foreign to commodity production.
Only buyer and seller, mutually independent, face each other in commodity production.
The relations between them cease on the day when the term stipulated in the contract they concluded expires. If the transaction is repeated, it is repeated as the -result of a new agreement which has nothing to do with the previous one and which only by chance brings the same seller together again with the same buyer.