Theorien über den Mehrwert
However, Marx believed that capitalism was inherently built upon practices of usury and thus inevitably leading to the separation of society into two classes: one composed of those who produce value and the other, which feeds upon the first one. In "Theories of Surplus Value" (written 1862–1863), he states "...that interest (in contrast to industrial profit) and rent (that is the form of landed property created by capitalist production itself) are superfetations (i.e., excessive accumulations) which are not essential to capitalist production and of which it can rid itself. If this bourgeois ideal were actually realisable, the only result would be that the whole of the surplus-value would go to the industrial capitalist directly, and society would be reduced (economically) to the simple contradiction between capital and wage-labour, a simplification which would indeed accelerate the dissolution of this mode of production."