Because of the development of economy, private property has appeared, and human beings have changed from primitive society, that is, tribes, to slave society.
Because of economic development, the landlord class appeared and grew, and history entered the feudal society from slave society.
It is also because of the development of economy, capitalism and the growth of the bourgeoisie that the rule of the landlord class was overthrown and the bourgeois regime was established.
2. Promote the development of science and technology and improve people's living standards and quality of life. The simplest example is that the landlord has questions and can ask them through the computer.
3. Promote cultural development. With the growth of different classes, culture is also improving. Primitive culture only exists in the aristocratic class, and the people have nothing to entertain. Later, folk songs, poems, Yuanqu, legends, dramas, novels, cross talks and so on appeared.