Marx's diagram of enlarged reproduction adheres to these conditions. Accumulation here takes its course, but it is not in the least indicated who is to benefit by it, who are the new consumers for whose sake production is ever more enlarged. The diagram assumes, say, the following course of events: the coal industry is expanded in order to expand the iron industry in order to expand the machine industry in order to expand the production of consumer goods. This last, in turn, is expanded to maintain both its own workers and the growing army of coal, iron and machine operatives. And so on _ad infinitum_. We are running in circles, quite in accordance with the theory of Tugan Baranovski. Considered in isolation, Marx's diagram does indeed permit of such an interpretation since he himself explicitly states time and again that he aims at presenting the process of accumulation of the aggregate capital in a society consisting solely of capitalists and workers. Passages to this effect can be found in every volume of _Capital_. In volume i, in the very chapter on 'The Conversion of Surplus-Value into Capital', he says: 'In order to examine the object of our investigation in its integrity, free from all disturbing subsidiary circumstances, we must treat the whole world as one nation, and assume that capitalist production is everywhere established and has possessed itself of every branch of industry.'[333] In volume ii, the assumption repeatedly returns; thus in chapter 17 on 'The Circulation of Surplus-Value': 'Now, there are only two points of departure: The capitalist and the labourer. All third classes of persons must either receive money for their services from these two classes, or, to the extent that they receive it without any equivalent services, they are joint owners of the surplus-value in the form of rent, interest, etc.... The capitalist class, then, remains the sole point of departure of the circulation of money.'[334] Further, in the same chapter 'On the Circulation of Money in Particular under Assumption of Accumulation': 'But the difficulty arises when we assume, not a partial, but a general accumulation of money-capital on the part of the capitalist class. Apart from this class, there is, according to our assumption--the general and exclusive domination of capitalist production--no other class but the working class.'[335] And again in chapter 20: '... there are only two classes in this case, the working class disposing of their labour-power, and the capitalist class owning the social means of production and the money.'[336]