The Wealth of Nations by Part 4 Chapter 7 Page 119

consequently have been sold there for so much a better price. So far as that weed, therefore, can, by its cheapness and abundance, increase the enjoyments or augment the industry either of England or of any other country, it would, probably, in the case of a free trade, have produced both these effects in somewhat a greater degree than it can do at present.

England, indeed, would not in this case have had any advantage over other countries. She might have bought the tobacco of her colonies somewhat cheaper, and consequently have sold some of her own commodities somewhat dearer than she actually does. But she could neither have bought the one cheaper nor sold the other dearer than any other country might have done. She might, perhaps have gained an absolute, but she would certainly have lost a relative advantage.