Final answer:
Rosa Luxemburg was a fundamentalist revolutionary who believed in using revolutionary action to achieve social change. She advocated for mass strikes and insurrections as a means to disrupt the capitalist system and bring about a socialist society.
Step-by-step explanation:
Rosa Luxemburg was considered a fundamentalist revolutionary due to her strong belief in revolutionary action to achieve social change. She believed that only through a complete overthrow of the existing capitalist system could true equality and justice be achieved.
Luxemburg advocated for mass strikes and insurrections as a means to disrupt the capitalist system and bring about a socialist society. She believed that the working class must rise up against their oppressors and take control of the means of production.
Luxemburg's ideas were influential in the context of the revolutionary movements in early 20th-century Europe, particularly during the German Revolution of 1918-1919.