The Wealth of Nations by Part 2 Chapter 5 Page 39

trade. The riches, and so far as power depends upon riches, the power of every country must always be in proportion to the value of its annual produce, the fund from which all taxes must ultimately be paid. But the great object of the political economy of every country is to increase the riches and power of that country. It ought, therefore, to give no preference nor superior encouragement to the foreign trade of consumption above the home trade, nor to the carrying trade above either of the other two.

It ought neither to force nor to allure into either of those two channels a greater share of the capital of the country than what would naturally flow into them of its own accord.

When the produce of any particular branch of industry exceeds what the demand of the country requires, the