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"By pursuing his own interest [every 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."
(1723-1790) Scottish philosopher and economist
An Inquiry into the Nature and Causes of the Wealth of Nations (1776), Book IV, Chap. 2 (New York: Random House, 1937, p. 423)