'The creation of surplus-value, assuming the necessary means of production, or sufficient accumulation of capital, to be existing, finds no other limit but the labouring population, when the rate of surplus-value, that is, the intensity of exploitation, is given; and no other limit but the intensity of exploitation, when the labouring population is given. And the capitalist process of production consists essentially of the production of surplus-value, materialised in the surplus-product, which is that aliquot portion of the produced commodities, in which unpaid labour is materialised. It must never be forgotten, that the production of this surplus-value--and the re-conversion of a portion of it into capital, or accumulation, forms an indispensable part of this production of surplus-value--is the immediate purpose and the compelling motive of capitalist production. It will not do to represent capitalist production as something which it is not, that is to say, as a production having for its immediate purpose the consumption of goods, or the production of means of enjoyment for the capitalists. (And, of course, even less for the worker. R. L.) This would be overlooking the specific character of capitalist production, which reveals itself in its innermost essence. The creation of this surplus-value is the object of the direct process of production, and this process has no other limits than those mentioned above. As soon as the available quantity of surplus-value has been materialised in commodities, surplus-value has been produced. But this production of surplus-value is but the first act of the capitalist process of production, it merely terminates the act of direct production. Capital has absorbed so much unpaid labour. With the development of the process, which expresses itself through a falling tendency of the rate of profit, the mass of surplus-value thus produced is swelled to immense dimensions. Now comes the second act of the process. The entire mass of commodities, the total product, which contains a portion which is to reproduce the constant and variable capital as well as a portion representing surplus-value, must be sold. If this is not done, or only partly accomplished, or only at prices which are below the prices of production, the labourer has been none the less exploited, but his exploitation does not realise as much for the capitalist. It may yield no surplus-value at all for him, or only realise a portion of the produced surplus-value, or it may even mean a partial or complete loss of his capital. The conditions of direct exploitation and those of the realisation of surplus-value are not identical. They are separated logically as well as by time and space. The first are only limited by the productive power of society, the last by the proportional relations of the various lines of production and by the consuming power of society. This last-named power is not determined either by the absolute