The expansion of Marxism to include both Lenin's concept of imperialism as the final form of capitalism and a shift in the focus of struggle from the developed to the underdeveloped countries.
马克思列宁主义马克思主义的延伸，包含了列宁的帝国主义是资本主义的最终表现形式的理论，并指出了斗争中心从发达国家到不发达国家的转移
