How did street dance come into being?

In the past, American society was very chaotic, because America was an immigrant country, so there were many people of different races here. For example, black slaves from Africa were sold here. Their status is very underground, and then whites and blacks live separately. Discrimination here is very serious. Crimes often occur in black areas: rape, robbery, murder, drug trafficking, etc ... because it is chaotic here. Over time, people have excess inventory. Some young black people have nowhere to vent, but another person on TV performed some strange moves (not street dance). Then people found it interesting and imitated it one after another, and gradually street dance sprouted. Then the United States gradually developed and many different cultures appeared, such as dancing, tango and tap dancing. Bullfighting ... a lot ... and the emergence of martial arts in China. People integrated them into it and gradually formed a dance. Many dances in street dance originated in Africa. The aborigines all danced. Hip-hop used to be different from now. Fighting dance belongs to toprock, and then it has no direct connection with powermove. Before making the next one, the four main parts are separated. Because young people usually have nothing to do, they find it interesting.