Smith's second and final book, published in 1776, was a polemic against restrictive trade practices. It was written for political leaders of the day and became a blueprint for the science of political economy in the US.
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By preferring the support of domestic to that of foreign industry, he intends only his own security. And by directing that industry in such a manner as its produce may be of the greatest value, he intends only his own gain. And he is in this, as in many other cases, led by an invisible hand to promote an end which was no part of his intention.
Great Britain have for more than a century past amused the people with the imagination that they possessed a great empire on the west side of the Atlantic. This empire, however, has hitherto existed in imagination only.
It has hitherto been not an empire, but the project of an empire, not a gold mine, but the project of a gold mine.
A project which has cost, which continues to cost, and which if pursued in the same way as it has been hitherto, is likely to cost immense expense without being likely to bring any profit.
For a very small expense, the public can facilitate, can encourage, and can even impose upon almost the whole body of the people the necessity of acquiring those most essential parts of education.