The phrase laissez-faire is one of the most consequential borrowings from French into English, naming an economic and political philosophy that has shaped modern history. The French literally translates as let do or allow to act, combining laissez (the imperative form of laisser, to let, to allow) with faire (to do, to make). The underlying Latin roots are laxāre (to loosen, to relax, to let go) and facere (to do, to make). Laissez-faire is thus, at its deepest etymological level, an instruction to loosen and let things be done.
The phrase's origin is traditionally traced to an exchange between the French finance minister Jean-Baptiste Colbert and a group of merchants, variously dated to around 1680. When Colbert asked what the government could do to help commerce, the merchant Legendre (or, in some versions, another participant) reportedly replied: "Laissez-nous faire" — Leave us alone, let us do it. While the historicity of this specific exchange is uncertain, it captures the essence of the philosophy: that commerce flourishes best when government stays out of the way.
The phrase was formalized as economic doctrine by the Physiocrats, a school of French economists active in the mid-eighteenth century. Vincent de Gournay is credited with popularizing the fuller formulation laissez faire, laissez passer (let do, let pass) — advocating both freedom of production and freedom of trade. The Physiocrats believed that natural economic laws, like natural physical laws, would produce optimal outcomes if allowed to operate without artificial interference.
These ideas profoundly influenced Adam Smith, whose The Wealth of Nations (1776) articulated the case for free markets and limited government intervention with unprecedented clarity and force. Although Smith did not use the French phrase, his concept of the invisible hand — the idea that individual self-interest, operating through free markets, produces collective benefit — is the intellectual heir of the Physiocratic laissez-faire tradition.
English adopted the phrase in the early nineteenth century, initially as a specific term in economic theory before it generalized to describe any non-interventionist attitude. A laissez-faire approach to parenting, management, or governance implies deliberately standing back and allowing events, people, or processes to develop without direction or interference.
The word laisser, from Latin laxāre (to loosen), connects laissez-faire to a family of English words about loosening and relaxing: lax, relax, release, and lease all descend from the same Latin root. The etymological implication is that laissez-faire policy involves loosening the bonds of regulation — untying the constraints that government places on economic activity.
The philosophy named by the phrase has been one of the most debated in modern political economy. Advocates argue that free markets produce innovation, efficiency, and prosperity. Critics argue that unregulated markets produce inequality, exploitation, and instability. The oscillation between laissez-faire and interventionist policies has defined much of modern economic history, making