The Wealth of Nations by Part 3 Chapter 1 Page 11

the labour of his own family, is really a master, and independent of all the world.

In countries, on the contrary, where there is either no uncultivated land, or none that can be had upon easy terms, every artificer who has acquired more stock than he can employ in the occasional jobs of the neighbourhood endeavours to prepare work for more distant sale. The smith erects some sort of iron, the weaver some sort of linen or woollen manufactory. Those different manufactures come, in process of time, to be gradually subdivided, and thereby improved and refined in a great variety of ways, which may easily be conceived, and which it is therefore unnecessary to explain any further.

In seeking for employment to a capital, manufactures are, upon equal or nearly equal profits, naturally preferred