An important theme that persists throughout the book is the idea that the economic system is automatic, and, when left with substantial freedom, able to regulate itself. This is often referred to as the “invisible hand.” The ability to self-regulate and to ensure maximum efficiency, however, is threatened by monopolies, tax preferences, lobbying groups, and other “privileges” extended to certain members of the economy at the expense of others.

It is the magnum opus of the Scottish economist and moral philosopher Adam Smith. First published in 1776, the book offers one of the world's first collected descriptions of what builds nations' wealth, and is today a fundamental work in classical economics. By reflecting upon the economics at the beginning of the Industrial Revolution, the book touches upon such broad topics as the division of labour, productivity, and free markets.

Adam Smith was a Scottish moral philosopher, pioneer of political economy, and a key figure in the Scottish Enlightenment. He is best known for two classic works: The Theory of Moral Sentiments (1759), and An Inquiry into the Nature and Causes of the Wealth of Nations (1776).