From slavery to feudalism, and then from feudalism to capitalism, the replacement of these classes has inevitable similarities. It is the progress of human civilization, the improvement of human rights, the relations of production and so on that have changed the human social system. Similarly, socialist fairness will eventually replace capitalism. However, now the contradiction of capitalism has made a soft landing, and social development has not yet reached the basic threshold of entering a socialist society. Therefore, in the final analysis, this is an irreversible social and historical development trend.