In economics, the invisible hand, also known as the invisible hand of the market, the term economists use to describe the self-regulating nature of the marketplace is a metaphor first coined by the economist Adam Smith in The Theory of Moral Sentiments. For Smith, the invisible hand was created by the conjunction of the forces of self-interest, competition, and supply and demand, which he noted as being capable of allocating resources in society. This is the founding justification for the laissez-faire economic philosophy.