The means of production become public property, however, not everyone would like to work for public ownership. Ultimately, the Great Leap Forward allowed some progress in modernization in China after the Civil War, but it led to a severe famine in China, and approximately 20 million people died in this famine. To some extent, Engel's theory of socialism is correct, but in practice it seems that Engels has a rather optimistic view of human nature. I think this is one of the reasons why the people's communes failed at that time. In conclusion, Engels realizes that human beings always have the desire to make their own history and control their own destiny. However, he believes that human beings always develop according to a “hidden plan”. Only when human beings achieve socialism will they achieve complete freedom, which is also the final goal of socialism. It offers an admirable utopian future for human beings. But in my opinion, it is a utopia because of what happened in China in the last century. But human beings will always try to control their own destiny. The fact is that human beings should always try to be