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By pursuing his own interest (the individual) frequently promotes that of the society more effectually than when he really intends to promote it. I have never known much good done by those who affected to trade for the public good.

1776 An Inquiry into the Nature and Causes of the Wealth of Nations, bk.4, ch.3.
By pursuing his own interest (the individual) frequently promotes that of the society more effectually than when he really intends to promote it. I have never known much good done by those who affected to trade for the