In chapter xxvi Rosa Luxemburg advances her central thesis--that it is the invasion of primitive economies by capitalism which keeps the system alive. There follows a scorching account of the manner in which the capitalist system, by trade, conquest and theft, swallowed up the pre-capitalist economies,--some reduced to colonies of capitalist nations, some remaining nominally independent--and fed itself upon their ruins. The thread of analysis running through the historical illustrations is not easy to pick up, but the main argument seems to be as follows: As soon as a primitive closed economy has been broken into, by force or guile, cheap mass-produced consumption goods displace the old hand production of the family or village communities, so that a market is provided for ever-increasing outputs from the industries of Department II in the old centres of capitalism, without the standard of life of the workers who consume these commodities being raised.[47] The ever-growing capacity of the export industries requires the products of Department I, thus maintaining investment at home. At the same time great capital works, such as railways, are undertaken in the new territories.[48] This investment is matched partly by savings from surplus extracted on the spot, but mainly by loans from the old capitalist countries. There is no difficulty here in accounting for the inducement to invest, for the new territories yield commodities unobtainable at home.[49] We might set out the essence of the argument as follows: Cloth from Lancashire pays for labour in America, which is used to produce wheat and cotton. These provide wages and raw materials to the Lancashire mills, while the profits acquired both on the plantations and in the mills are invested in steel rails and rolling stock, which open up fresh territories, so that the whole process is continuously expanding. Moreover, apart from profits earned on capital actually invested in the new territories, great capital gains are made simply by acquiring possession of land and other natural resources.[50] Labour to work the resources may be provided by the local dispossessed peasantry or by immigration from the centres of capitalism.[51] Investment in equipment for it to use is more profitable than in that operated by home labour, partly because the wretched condition of the colonial workers makes the rate of exploitation higher,[52] but mainly just because they are on the spot, and can turn the natural resources seized by the capitalists into means of production. No amount of investment in equipment for British labour would produce soil bearing cotton, rubber or copper. Thus investment is deflected abroad[53] and the promise of profit represented by the natural resources calls into existence, by fair means or foul, the labour and capital to make it come true. The process of building up this capital provides an outlet for the old industries and rescues them from the contradictions inherent in