The Wealth of Nations by Part 2 Chapter 5 Page 14

agents that occasion it. The capital employed in agriculture, therefore, not only puts into motion a greater quantity of productive labour than any equal capital employed in manufactures, but in proportion, too, to the quantity of productive labour which it employs, it adds a much greater value to the annual produce of the land and labour of the country, to the real wealth and revenue of its inhabitants.

Of all the ways in which a capital can be employed, it is by far the most advantageous to the society.

The capitals employed in the agriculture and in the retail trade of any society must always reside within that society. Their employment is confined almost to a precise spot, to the farm and to the shop of the retailer. They must generally, too, though there are some exceptions to this,