Key figures: Adam Smith
Summary
An Inquiry into the Nature and Causes of the Wealth of Nations, commonly known as The Wealth of Nations, was published on March 9, 1776, by Scottish economist and philosopher Adam Smith. The work appeared in two volumes, with Books I–III in the first and Books IV–V in the second. Smith had been developing its arguments over years of lecturing at the University of Glasgow and during a period of private tutoring in France, where he met leading French Physiocrats.
The text is organized into five books. Book I analyzes the division of labor as the primary driver of productivity, opening with the famous pin-factory example demonstrating how specialization multiplies output. Book II examines capital accumulation and its role in economic growth. Book III traces the history of economic development in Europe. Book IV critiques the prevailing mercantilist system — which held that national wealth derived from accumulating gold and restricting trade — and makes the case for free trade. Book V addresses the proper sources of government revenue and the limits of state expenditure. Running through the work is Smith’s argument that individuals pursuing their own interest in a competitive market are guided by what he called an “invisible hand” to produce outcomes beneficial to society as a whole, even without intending to do so. The first edition sold out within six months of publication.
The book influenced contemporaries including American founders Thomas Jefferson and James Madison, and its critique of mercantilism resonated with colonists already in economic conflict with British trade restrictions.
Significance
The Wealth of Nations is widely regarded as the founding text of classical economics and a foundational work of modern economic thought. Published at the close of the mercantilist era and on the eve of the Industrial Revolution, it provided the theoretical framework for free-market capitalism and free trade that shaped British commercial policy in the nineteenth century and international economic institutions in the twentieth. Its central concepts — division of labor, comparative advantage, competitive markets, and the limits of government intervention — remain core to economic analysis. The work has received over 36,000 academic citations and ranks as the second most-cited economics book published before 1950, according to bibliometric studies. It established economics as a systematic, independent discipline distinct from moral philosophy and political administration.