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

All wealth consists of desirable things; that is, things which satisfy human wants directly or indirectly: but not all desirable things are reckoned as wealth.

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.

And very often the influence exerted on a person's character by the amount of his income is hardly less, if it is less, than that exerted by the way in which it is earned.

It is common to distinguish necessaries, comforts, and luxuries; the first class including all things required to meet wants which must be satisfied, while the latter consist of things that meet wants of a less urgent character.