Which movement was dedicated to spreading the ideas of socialism?

While Social Democracy does involve ideas aligned with socialism, the movement most centrally dedicated to promoting socialism is the Communist Party. The Communist Party aims to implement a socialist system by abolishing capitalism entirely and establishing a classless society. It was founded on the principles laid out by Karl Marx and Friedrich Engels, advocating for revolutionary action and the end of private ownership of the means of production.

Social Democracy, on the other hand, traditionally advocates for a more gradual transition to socialism through democratic means and often works within existing political structures. This approach typically supports reforms within capitalism rather than seeking to abolish it completely. Therefore, while both Social Democracy and the Communist Party work toward socialist ideals, the Communist Party is specifically dedicated to the complete realization of those ideas as part of its core mission.