David Harvey

The accumulation of capital involves the the expansion of value over time.

There is, in short, no 'spatial fix' that can contain the contradictions of capitalism in the long run.

Because the earth is not a product of labour it cannot have a value.

Capitalists behave like capitalists wherever they are. They pursue the expansion of value through exploitation without regard to the social consequences.

Skills that are monopolizable are anathema to capital.

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

But the net effect of increasing scale, centralization of capital, vertical integration and diversification within the corporate form of enterprise has been to replace the 'invisible hand' of the market by the 'visible hand' of the managers.

The social relations of capitalism have penetrated slowly into all spheres of life to make wage labour the general condition of existence only in fairly recent times.

If all money capital invests in appropriation and none in actual production, then capitalism is not long for this world.

Speculation in land may be necessary to capitalism, but speculative orgies periodically become a quagmire of destruction for capital itself.

The geographical movement of money and commodities as capital is not the same as the movements of products and of precious metals. Capital is, after all, money used in a certain way, and is by no means identical with all money uses.

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