Democratic socialism is a left-wing economic and political philosophy that supports political democracy and some form of a socially owned economy, with a particular emphasis on economic democracy, workplace democracy, and workers' self-management within a market socialist, decentralised planned, or democratic centrally planned socialist economy. Democratic socialists argue that capitalism is inherently incompatible with the values of freedom, equality, and solidarity and that these ideals can only be achieved through the realisation of a socialist society. Although most democratic socialists seek a gradual transition to socialism, democratic socialism can support revolutionary or reformist politics to establish socialism. Democratic socialism was popularised by socialists who opposed the backsliding towards a one-party state in the Soviet Union and other countries during the 20th century.