Social democracy is a centre-left political ideology. Social democrats do not support the overthrowing of the bourgeois state and creation of the dictatorship of the proletariat, or the bringing about of socialism, and as such can be classified as a bourgeois capitalist ideoogy. Social democrats are often anti-communists, and are considered by many Marxists to be more of a threat to socialism than other more right-wing ideologies. Social democrats until about the 1950s were reformists who believed that socialism could be acheived through electoral means, before eventually embracing liberal captialism.
Social democrats have held power in a number of capitalist countries, notably the United Kingdom and Scandinavian countries. Social democratic governments have sometimes nationalized key national industries while maintaining mixed economies which maintained private ownership of capital and private business enterprise. Social democrats also promote tax-funded welfare programs and regulation of markets.