What kind of city we wish to build should reflect our personal wishes and needs.
Money must exist before it can be turned into capital.
The invocation of social necessity should alert us. It contains the seeds for Marx's critique of political economy as well as for his dissection of capitalism.
Perpetual revolutions in technology can mean the devaluation of fixed capital on an extensive scale.
Rampant inflation is just as hard to live with as the devaluation of commodities.
Money could not be converted into capital if wage labour did not exist.