Capital is that part of wealth which is devoted to obtaining further wealth.

Slavery was regarded by Aristotle as an ordinance of nature, and so probably was it by the slaves themselves in olden time.

Individual and national rights to wealth rest on the basis of civil and international law, or at least of custom that has the force of law.

Producer's Surplus is a convenient name for the genus of which the rent of land is the leading species.

The most reckless and treacherous of all theorists is he who professes to let facts and figures speak for themselves.

All labour is directed towards producing some effect.

Knowledge is our most powerful engine of production.