Democratic socialism is a political ideology that advocates political democracy alongside social ownership of the means of production, often with an emphasis on democratic management of enterprises within a socialist economic system. The term "democratic socialism" is sometimes used synonymously with "socialism"; the adjective "democratic" is often added to distinguish it from the Marxist–Leninist brand of socialism, which is widely viewed as being non-democratic in practice. Democratic socialism is also sometimes used as a synonym for social democracy, although many say this is misleading because democratic socialism advocates social ownership of the means of production, whereas social democracy does not.
Democratic socialism is distinguished from both the Soviet model of centralized socialism and from social democracy, where social democracy refers to support for political democracy, nationalization of key industries, and a welfare state. The distinction with the former is made on the basis of the authoritarian form of government and centralized economic system that emerged in the Soviet Union during the 20th century, while the distinction with the latter is made on the basis that democratic socialism is committed to systemic transformation of the economy while social democracy is not. That is, whereas social democrats only seek to "humanize" capitalism through state intervention, democratic socialists see capitalism as inherently incompatible with the democratic values of liberty, equality and solidarity; and believe that the issues inherent to capitalism can only be solved by superseding private ownership with some form of social ownership. Ultimately democratic socialists believe that reforms aimed at addressing the economic contradictions of capitalism will only cause more problems to emerge elsewhere in the economy, that capitalism can never be sufficiently "humanized", and that it must therefore ultimately be replaced with socialism.
Democratic socialism is not specifically revolutionary or reformist, as many types of democratic socialism can fall into either category, with some forms overlapping with social democracy, supporting reforms within capitalism as a prelude to the establishment of socialism. Some forms of democratic socialism accept social democratic reformism to gradually convert the capitalist economy to a socialist one using pre-existing democratic institutions, while other forms are revolutionary in their political orientation and advocate for the overthrow of the bourgeoisie and the transformation of the capitalist economy to a socialist economy.