because part of it is needed to enlarge production, for technical improvements which, to the individual entrepreneur, will be a necessary condition of existence in a competitive society. Secondly, because an expanding capitalist production implies an expansion in those branches of industry which produce means of production (e.g. the mining industry, the machine industry and so forth) and whose products from the very beginning take a use-form that is incapable of personal consumption and can only function as capital. Thirdly and lastly, the higher labour productivity and capital savings that can be achieved by mass production of cheap commodities increasingly impel society towards mass production of commodities which cannot all be consumed by a mere handful of capitalists. Although one capitalist can realise his surplus value in the surplus product of another capitalist and _vice versa_, this is only true for products of a certain branch, for consumer goods. However, the incentive of capitalist production is not the satisfaction of personal wants, and this is further shown by the progressive decline in the production of consumer as compared to that of producer goods. 'Thus we see that the aggregate product of a capitalist nation must greatly exceed the requirements of the whole industrial population employed, in the same way as each individual factory produces vastly in excess of the requirements of both its workers and the entrepreneur, and this is entirely due to the fact that the nation is a capitalist nation, because the distribution of resources within the society does not aim to satisfy the real wants of the population but only the effective demand. Just as an individual factory-owner could not maintain himself as a capitalist even for a day if his market were confined to the requirements of his workers and his own, so the home market of a developed capitalist nation must also be insufficient.'