Speculation in land may be necessary to capitalism, but speculative or — David Harvey

"Money could not be converted into capital if wage labour did not exist."

"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."

"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."

"The inner logic that governs the laws of motion of capitalism is cold, ruthless and inexorable, responsive only to the law of value. Yet value is a social relation, a product of a particular historical process. Human beings were organizers, creators and participants in that history. We have, Marx asserts, built a vast social enterprise which dominates us, delimits our freedoms and ultimately visits upon us the worst forms of degradation."

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

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