The Wealth of Nations by Part 3 Chapter 1 Page 5

luxury. It is the surplus produce of the country only, or what is over and above the maintenance of the cultivators, that constitutes the subsistence of the town, which can therefore increase only with the increase of this surplus produce.

The town, indeed, may not always derive its whole subsistence from the country in its neighbourhood, or even from the territory to which it belongs, but from very distant countries; and this, though it forms no exception from the general rule, has occasioned considerable variations in the progress of opulence in different ages and nations.

That order of things which necessity imposes in general, though not in every particular country, is, in every particular country, promoted by the natural inclinations of man. If human institutions had never thwarted