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

Nature's action is complex: and nothing is gained in the long run by pretending that it is simple, and trying to describe it in a series of elementary propositions.

The price of every thing rises and falls from time to time and place to place; and with every such change the purchasing power of money changes so far as that thing goes.

Civilized countries generally adopt gold or silver or both as money.

Political Economy or Economics is a study of mankind in the ordinary business of life.

In the absence of any short term in common use to represent all desirable things, or things that satisfy human wants, we may use the term Goods for that purpose.

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