Use the passage and your knowledge of social studies to answer the following question.
By preferring the support of domestic to that of foreign industry, he intends only his
si 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 Purse-
ng his own interest he frequently promotes that of the society more effectively than
when he really intends to promote it."
This passage most likely appeared as part of