If we study the annual function of social capital — hence of the total capital of which the individual capitals form only fractional parts, whose movement is their individual movement and simultaneously integrating link in the movement of the total capital — and its results, i.e., if we study the commodity-product furnished by society during the year, then it must become apparent how the process of reproduction of the social capital takes place, what characteristics distinguish this process of reproduction from the process of reproduction of an individual capital, and what characteristics are common to both.
The annual product includes those portions of the social product which replace capital, namely social reproduction, as well as those which go to the consumption-fund, those which are consumed by labourers and capitalists, hence both productive and individual consumption. It comprises also the reproduction (i.e., maintenance) of the capitalist class and the working-class, and thus the reproduction of the capitalist character of the entire process of production. It is evidently the circulation formula C' — { M — C ... P... C' ,which we have to analyze, and consumption necessarily plays a role in it; for the point of departure, C' = C + c, the commodity-capital embraces both the constant and variable capital-value, and the surplus-value. Its movement therefore includes both individual and productive consumption. In the circuits M — C ... P... C'— M' and P ... C'— M'— C ... P, the movement of the capital is the starting and finishing point. And of course this includes consumption, for the commodity, the product, must be sold. When this has assumedly been done it is immaterial for the movement of the individual capital what becomes of the commodities subsequently. On the other hand in the movement of C' ... C' the conditions of social reproduction are discernible precisely from the fact that it must be shown what becomes of every portion of value of this total product, C'. In this case the total process of reproduction includes the process of consumption brought about by the circulation quite as much as the process of reproduction of the capital itself.
The question that confronts us directly is this: How is the capital consumed in production replaced in value out of the annual product and how does the movement of this replacement intertwine with the consumption of the surplus-value by the capitalists and of the wages by the labourers? It is then first a matter of reproduction on a simple scale.
Simple reproduction, reproduction on the same scale, appears as an abstraction, inasmuch as on the one hand the absence of all accumulation or reproduction on an extended scale is a strange assumption in capitalist conditions, and on the other hand conditions of production do not remain exactly the same in different years (and this is assumed). The assumption is that a social capital of a given magnitude produces the same quantity of commodity-value this year as last, and supplies the same quantum of wants, although the forms of the commodities may change in the process of reproduction. However, as far as accumulation does take place, simple reproduction is always a part of it, and can therefore be studied by itself, and is an actual factor of accumulation. The value of the annual product may decrease, although the quantity of use-values may remain the same; or the value may remain the same although the quantity of the use-values may decrease; or the quantity of value and of the reproduced use-values may decrease simultaneously. All this amounts to reproduction taking place either under more favorable conditions than before or under more difficult ones, which may result in imperfect — defective — reproduction. All this can refer only to the quantitative aspect of the various elements of reproduction, not to the role which they play as reproducing capital or as a reproduced revenue in the entire process.
