An unconditional basic income is a proposed system of social security in which all citizens or residents of a country regularly receive an unconditional sum of money, either from a government or some other public institution, in addition to any income received from elsewhere. A basic income is typically intended to be only enough for a person to survive on, so as to encourage people to engage in economic activity. A basic income of any amount less than the social minimum is sometimes referred to as a "partial basic income". Basic income systems financed on returns to publicly owned enterprises are major components in many proposals for market socialism. Basic income schemes have also been promoted within the context of capitalist systems, which would be financed through taxation or a negative income tax. Similar proposals for "capital grants provided at the age of majority" date to Thomas Paine's Agrarian Justice of 1795, there paired with asset-based egalitarianism. The phrase "social dividend" was commonly used as a synonym for basic income in the English-speaking world before 1986, after which the phrase "basic income" gained widespread currency.