Rosa Luxemburg was a Polish and naturalised-German revolutionary socialist, orthodox Marxist, and anti-War activist during the First World War. She became a key figure of the revolutionary socialist movements of Poland and Germany during the late 19th and early 20th century, particularly the Spartacist uprising.

Revolutionary socialism is a political philosophy, doctrine, and tradition within socialism that stresses the idea that a social revolution is necessary to bring about structural changes in society. More specifically, it is the view that revolution is a necessary precondition for transitioning from a capitalist to a socialist mode of production. Revolution is not necessarily defined as a violent insurrection; it is defined as a seizure of political power by mass movements of the working class so that the state is directly controlled or abolished by the working class as opposed to the capitalist class and its interests.