The Wealth of Nations by Part 1 Chapter 11 Page 268

are chiefly a sheep country, would have been very deeply affected by this event, had not the rise in the price of butcher’s meat fully compensated the fall in the price of wool.

As the efficacy of human industry, in increasing the quantity either of wool or of raw hides, is limited, so far as it depends upon the produce of the country where it is exerted; so it is uncertain so far as it depends upon the produce of other countries.

It so far depends, not so much upon the quantity which they produce, as upon that which they do not manufacture; and upon the restraints which they may or may not think proper to impose upon the exportation of this sort of rude produce. These circumstances, as they are altogether independent of domestic industry, so they necessarily render the efficacy of