五四运动前，毛泽东把“宇宙之真理”看作改造社会的“本源”，并把改造社会的希望寄托在“圣人”和“君子”身上，从而在社会存在和社会意识的关系以及人民群众历史作用这两个问题上陷入了唯心史观。五四运动后，毛泽东提出“吃饭问题最大”、“民众联合的力量最强”，也正是在这两个问题上开始形成唯物史观的 Before the May Fourth Movement, Mao Zedong regarded “the truth of the universe” as the “original source” of social transformation and placed the hope of transforming the society on the “saints” and “gentlemen”, so that in the relationship between social existence and social awareness and the masses The two problems of history fall into the concept of idealism. After the May 4th Movement, Mao Zedong proposed that “the issue of eating the most,” “the strongest joint force among the people,” and it is precisely on these two issues that the formation of historical materialism