Invisible hand

The metaphorical market mechanism by which individuals pursuing their own interests can unintentionally promote broader social benefits. Its effects depend on conditions such as competition and the absence of significant external costs.

Price mechanism: A system in which prices communicate information about scarcity and guide economic decisions. Changing prices can coordinate buyers and producers without a central planner.
Adam Smith: An eighteenth-century Scottish philosopher and economist who wrote The Theory of Moral Sentiments and The Wealth of Nations. Smith gave the metaphor its best-known economic formulation.
Central planning: An economic system in which a central authority directs production and allocates resources. It contrasts decentralized market coordination with deliberate administrative direction.
Laissez-faire: A policy stance favoring limited government intervention in economic activity. The metaphor is often invoked to support restraint, though it does not settle policy choices.
Supply and demand: The relationship between quantities offered for sale and quantities buyers want at different prices. Their interaction helps explain how decentralized choices shape market prices and output.
The Wealth of Nations: Adam Smith’s 1776 book examining the sources of national wealth and the organization of commercial society. Its famous invisible-hand passage concerns domestic investment and unintended effects.
Market failure: A situation in which market outcomes fail to allocate resources efficiently under a specified criterion. Failures show circumstances in which private choices do not yield the expected social gains.
Welfare economics: The branch of economics that evaluates how resource allocation affects social welfare. It supplies tools for assessing whether market outcomes benefit society.
Market equilibrium: A market condition in which planned supply and demand match at a given price. The metaphor often describes individual choices contributing to coordinated market outcomes.
The Theory of Moral Sentiments: Adam Smith’s 1759 work on moral judgment, sympathy, and human conduct. It places Smith’s account of self-interest within a wider moral philosophy.

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