Adam Smith's The Wealth of Nations (1776): Birth of Economics

The Wealth of Nations is the short title of An Inquiry into the Nature and Causes of the Wealth of Nations, a book by the Scottish philosopher Adam Smith published in London on 9 March 1776. Written over about a decade, it explained how specialised work, markets and trade make nations richer, and it attacked the trade restrictions of the mercantile system. It is generally regarded as the founding work of modern economics and remains one of the most cited books in the history of ideas.

Background: the Scottish Enlightenment

Adam Smith was born in Kirkcaldy, a small port in Fife, and baptised on 5 June 1723 (Old Style); his father, a customs official, had died a few months earlier. He studied at the University of Glasgow under the philosopher Francis Hutcheson and then spent six years at Balliol College, Oxford, which he found intellectually disappointing.

Smith returned to Scotland in an age of remarkable intellectual energy, now known as the Scottish Enlightenment. Edinburgh and Glasgow were home to thinkers such as the philosopher David Hume, who became Smith’s closest friend, the historian William Robertson and the social theorist Adam Ferguson. The same circle produced the Encyclopaedia Britannica and supported scientists and engineers such as Joseph Black and James Watt.

In 1751 Smith became professor of logic at Glasgow and in 1752 professor of moral philosophy. His lectures covered ethics, law, government and what was called “police”, including commerce and public revenue. In 1759 he published The Theory of Moral Sentiments, a book on ethics built around the idea of sympathy, or the human ability to imagine the feelings of others.

The road to the book

In 1764 Smith resigned his chair to become tutor to the young Henry Scott, 3rd Duke of Buccleuch, on a tour of the Continent. The post paid generously and included a lifetime pension. He spent much of the next two years in France and Switzerland, including about a year and a half in Toulouse, a visit to Voltaire near Geneva and several months in Paris.

In Paris Smith met the French économistes, later called the Physiocrats, led by the court physician François Quesnay, and the administrator Anne-Robert-Jacques Turgot. The Physiocrats argued that agriculture was the true source of wealth and called for freer trade in grain. Smith admired their systematic approach, although he rejected their view that only farming was productive.

Returning to Britain in 1766, Smith spent most of the next years in his mother’s home in Kirkcaldy, working on the book. From 1773 he lived largely in London, revising it while watching the worsening crisis with the American colonies. The book was finally published in March 1776, a few months before the American Declaration of Independence.

Key arguments

The Wealth of Nations is a long work, divided into five books. Its main arguments include the following.

Wealth is production, not gold. Smith rejected the mercantilist idea that a country’s wealth consisted in its stock of gold and silver. True wealth, he argued, was the annual produce of the land and labour of a nation, the goods and services available to its people.

The division of labour. In his famous opening chapter, Smith described a pin factory in which ten workers, each specialising in a few operations, could make upwards of 48,000 pins a day, while a single untrained worker might not make twenty. Specialisation increased skill, saved time and encouraged invention. Its extent, he added, was limited by the size of the market.

Self-interest and exchange. Smith observed that people trade to benefit themselves, and that markets coordinate these choices. In a much-quoted passage he noted that we expect our dinner not from the benevolence of the butcher, the brewer, or the baker, but from their regard to their own interest. Competition, in his view, tended to push prices towards their “natural” level.

Against the mercantile system. Book IV attacked monopolies, tariffs, bounties and colonial trade restrictions that benefited favoured merchants at the expense of consumers. It is here that Smith used the phrase “invisible hand”, once only, to describe how investors who prefer to support domestic industry for their own security end up promoting the public interest without intending to.

The duties of government. In Book V Smith set out three main duties for the state: defence, the administration of justice, and the provision of certain public works and institutions that private individuals would not profitably build, such as roads, bridges and basic education. He also discussed fair principles of taxation, setting out four maxims: taxes should be proportional to ability to pay, certain rather than arbitrary, convenient in their timing and cheap to collect.

Wages, profits and rents. Smith analysed how the price of goods was divided among wages for labour, profits for capital and rent for land. He argued that wages rise fastest not in the richest countries but in those growing most quickly, and he noted with concern that employers found it easier than workers to combine to fix wages.

Costs of specialisation. Smith did not see the division of labour as purely beneficial. In Book V he warned that a worker who spends his whole life performing a few simple operations may become intellectually stunted, and he argued that public education for the common people was needed to counter this.

Reception and influence

The first edition sold out within about six months. David Hume, by then seriously ill, wrote to congratulate his friend shortly after publication; he died in August 1776. Smith revised the book through five editions in his lifetime, the last in 1789; the third edition of 1784 added important new material, including a chapter on the East India Company.

The book gradually influenced British policy. Politicians such as William Pitt the Younger publicly praised Smith, and the 1786 commercial treaty with France, which lowered tariffs between the two countries, reflected his ideas. In the 19th century, economists such as David Ricardo and John Stuart Mill built on his work to form what became known as classical economics, and the long campaign for free trade, culminating in the repeal of Britain’s Corn Laws in 1846, frequently invoked his name.

The book’s arguments about colonies drew particular attention. Smith judged that Britain’s attempt to monopolise trade with its American colonies cost more than it was worth, and he suggested either giving the colonies representation in Parliament or letting them go. Translations soon spread his ideas across Europe, with versions appearing in German, French, Danish, Italian and Spanish before the end of the century.

In 1778 Smith was appointed a Commissioner of Customs in Scotland, an irony often noted given his criticism of trade restrictions. He moved to Panmure House in Edinburgh’s Canongate, where he lived with his mother and cousin until his death on 17 July 1790. Shortly before he died he had most of his unpublished papers burned.

By the numbers

Myths and facts

Myth: Smith was a champion of unrestricted greed. Smith’s earlier book was a study of moral sympathy, and The Wealth of Nations repeatedly warns that merchants and manufacturers often conspire against the public. He supported markets largely because competition limited such abuses.

Myth: Smith opposed all government action. He argued for public spending on defence, justice, infrastructure and education, and accepted some regulation, such as rules on banking and the Navigation Acts, for reasons of security.

Myth: the “invisible hand” is the book’s central idea. The phrase appears only once and gained its fame mainly in the 20th century. The division of labour and the critique of mercantilism are more prominent themes in the text itself.

Timeline

• 1723, 5 June: Adam Smith is baptised in Kirkcaldy, Fife (Old Style date).
• 1752: Smith becomes professor of moral philosophy at the University of Glasgow.
• 1759: The Theory of Moral Sentiments is published.
• 1764-1766: Smith travels in France and Switzerland as tutor to the Duke of Buccleuch.
• 1776, 9 March: The Wealth of Nations is published in London.
• 1776, 25 August: David Hume dies in Edinburgh.
• 1778: Smith becomes a Commissioner of Customs and moves to Panmure House.
• 1790, 17 July: Smith dies in Edinburgh and is buried in the Canongate Kirkyard.

Legacy

The Wealth of Nations created a framework for thinking about prices, wages, profits, capital and trade that later economists refined but rarely abandoned. It shaped the case for free trade in 19th-century Britain and has been claimed, sometimes selectively, by thinkers across the political spectrum.

Smith’s reputation remains high. His portrait appeared on the Bank of England’s £20 note from 2007 until it was replaced by a new design in 2020. Panmure House, his last home, has been restored and now hosts events on economics and social science. His statue, unveiled in 2008, stands on Edinburgh’s Royal Mile.

Why it matters

The Wealth of Nations offered the first comprehensive explanation of how a commercial economy works and why some nations grow richer than others. Its arguments about specialisation, markets and the limits of state privilege still frame modern debates over trade, regulation and economic growth.