恩格斯曾指出,马克思的伟大历史功绩是把社会主义理论由空想变为科学,而这一转变正是通过唯物史观和剩余价值理论这两个伟大发现实现的。马克思以前的历史观对人的问题只能作抽象的理解,而马克思所创立的唯物史观是对以往一切旧历史观的根本变革,是马克思主义学说中最有理论意义和实践价值的内容,是历史唯物主义与主体价值观的并存与统一,是人的全面发展的历史观。 Engels pointed out that Marx’s great historical merit is to transform the theory of socialism from fantasy to science, and this transformation is achieved through two great discoveries: historical materialism and surplus-value theory. The historical view of Marx before can only make an abstract understanding of the human problem. The historical materialism established by Marx is the fundamental reform of all the old historical views in the past, the most theoretical and practical value in the Marxist theory, Is the coexistence and unification of historical materialism and subjective values, and is the historical view of man’s all-round development.