Knowledge is our most powerful engine of production.

The hope that poverty and ignorance may gradually be extinguished derives indeed much support from the steady progress of the working classes during the 19th century.

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

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.

In common use almost every word has many shades of meaning, and therefore needs to be interpreted by the context.

Material goods consist of useful material things, and of all rights to hold, or use, or derive benefits from material things, or to receive them at a future time.

The most valuable of all capital is that invested in human beings