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First published in 1776, the year in which the American Revolution officially began, Smith's Wealth of Nations sparked a revolution of its own. In it Smith analyzes the major elements of political economy, from market pricing and the division of labor to monetary, tax, trade, and other government policies that affect economic behavior. Throughout he offers seminal arguments for free trade, free markets, and limited government.
Criticizing mercantilists who sought to use the state to increase their nations' supply of precious metals, Smith points out that a nation's wealth should be measured by the well-being of its people. Prosperity in turn requires voluntary exchange of goods in a peaceful, well-ordered market. How to establish and maintain such markets? For Smith the answer lay in man's social instincts, which government may encourage by upholding social standards of decency, honesty, and virtue, but which government undermines when it unduly interferes with the intrinsically private functions of production and exchange. Social and economic order arise from the natural desires to better one's (and one's family's) lot and to gain the praise and avoid the censure of one's neighbors and business associates. Individuals behave decently and honestly because it gives them a clear conscience as well as the good reputation necessary for public approbation and sustained, profitable business relations.

The effects of the division of labour, in the general business of society, will be more easily understood, by considering in what manner it operates in some particular manufactures. It is commonly supposed to be carried furthest in some very trifling ones; not perhaps that it really is carried further in them than in others of more importance: but in those trifling manufactures which are destined to supply the small wants of but a small number of people, the whole number of workmen must necessarily be small; and those employed in every different branch of the work can often be collected into the same workhouse, and placed at once under the view of the spectator. In those great manufactures, on the contrary, which are destined to supply the great wants of the great body of the people, every different branch of the work employs so great a number of workmen, that it is impossible to collect them all into the same workhouse. We can seldom see more, at one time, than those employed in one single branch. Though in such manufactures, therefore, the work may really be divided into a much greater number of parts, than in those of a more trifling nature, the division is not near so obvious, and has accordingly been much less observed.

Adam Smith

Adam Smith (1723-1790) is commonly regarded as the first modern economist with the publication in 1776 of The Wealth of Nations. He wrote in a wide range of disciplines: moral philosophy, jurisprudence, rhetoric and literature, and the history of science. He was one of the leading figures in the Scottish Enlightenment. Smith also studied the social forces giving rise to competition, trade, and markets. While professor of logic, and later professor of moral philosophy at Glasgow University, he also had the opportunity to travel to France, where he met François Quesnay and the physiocrats; he had friends in business and the government, and drew broadly on his observations of life as well as careful statistical work summarizing his findings in tabular form. He is viewed as the founder of modern economic thought, and his work inspires economists to this day. The economic phrase for which he is most famous, the “invisible hand” of economic incentives, was only one of his many contributions to the modern-day teaching of economics.