The Wealth of Nations by Part 4 Chapter 7 Page 108

Those commodities of America are new values, new equivalents, introduced into Hungary and Poland to be exchanged there for the surplus produce of those countries. By being carried thither they create a new and more extensive market for that surplus produce. They raise its value, and thereby contribute to encourage its increase. Though no part of it may ever be carried to America, it may be carried to other countries which purchase it with a part of their share of the surplus produce of America; and it may find a market by means of the circulation of that trade which was originally put into motion by the surplus produce of America.

Those great events may even have contributed to increase the enjoyments, and to augment the industry of countries which not only never sent any commodities to America, but never received any from it.