The Wealth of Nations by Part 4 Chapter 8 Page 1

Conclusion of the Mercantile System

Though the encouragement of exportation and the discouragement of importation are the two great engines by which the mercantile system proposes to enrich every country, yet with regard to some particular commodities it seems to follow an opposite plan: to discourage exportation and to encourage importation. Its ultimate object, however, it pretends, is always the same, to enrich the country by an advantageous balance of trade. It discourages the exportation of the materials of manufacture, and of the instruments of trade, in order to give our own workmen an advantage, and to enable them to undersell those of other nations in all foreign markets; and by restraining, in this manner, the exportation of a few commodities, of no great price, it proposes to occasion a much greater and more valuable exportation of others.