All rent is based on the monopoly power of private owners of certain portions of the globe.

Marx set out to resolve the contradictions and to correct the errors in classical political economy. In this he thought he had succeeded very well. Judging by the sound and the fury of the controversy surrounding his interpretations, he either succeeded too well or deluded himself to the success of his enterprise.

Perpetual revolutions in technology can mean the devaluation of fixed capital on an extensive scale.

When money functions as measure of value it must truly represent the values it helps to circulate.

Individual capitalists, in short, necessarily act in such a way as to de-stabilize capitalism.

Capitalism will never fall on its own. It will have to be pushed. The accumulation of capital will never cease. It will have to be stopped. The capitalist class will never willingly surrender its power. It will have to be dispossessed.

My advice to everybody would be to go out as much as possible and deal with social inequality and environmental degradation because these issues are increasingly prescient.