사회민주주의
Social democracy has been described as the evolutionary form of democratic socialism that aims to gradually and peacefully achieve socialism through established political processes rather than social revolution as advocated by revolutionary socialists. In this sense, social democracy is synonymous with "democratic socialism" and represented its original form, i.e. socialism achieved by democratic means, usually through the parliament. While social democrats continue to call and describe themselves as "democratic socialists" or simply "socialists", with time, the post-war association of social democracy as policy regime and the development of the Third Way, "democratic socialism" has come to include communist and revolutionary tendencies, effectively representing the original meaning of "social democracy" as the latter has shifted towards mostly reformism.