Why can American black folk songs evolve into pop music such as blues, jazz and hip-hop?

As we all know, the ancestors of African Americans were slaves trafficked from West Africa to North America from the beginning of16th century to the end of19th century. West African music at that time is the main source of African American music today. We didn't know much about the music of West Africa at that time because no musicians made a systematic investigation of West Africa at that time. Since the 20th century, especially since the 1970s, many musicians have investigated this area, which makes us have a deeper understanding of its contemporary folk music. Considering that contemporary folk music is the result of the inheritance and development of ancient folk music, we can refer to the folk music in West Africa today and speculate on the main characteristics of West African folk music from 16 to 19 century. In 1930s and 1940s, Shanghai was the birthplace of jazz in China, where there were quite large-scale jazz performances and some excellent jazz musicians. But jazz at that time was mainly for ballroom dancing. After decades of vicissitudes, jazz almost disappeared in China, with a fault of nearly forty years. This period is an important development stage of jazz. Jazz has long been out of the stable dance form, integrated with rich musical style, cultural characteristics and playing skills, which has the most charm, expressiveness and appeal of music itself, and has long been among the ranks of elegant arts. Since the end of 1980s, jazz has been revived in China and gained more and more development space.

Blues music focuses on performance, and the singer's "soul" can communicate with music, that is, the ability to improvise. The application of major and minor chords, the scale of 37-flat, and the skill of pushing strings of guitar have had a far-reaching influence on almost all contemporary pop music styles.

Hiphop is a transliteration of hip hop, which refers to a fast-paced dance style.

Rap is rap, including many rap methods, including Gangsta Rap, a powerful rap music type, including rock. Hip Hop is a kind of music in which RNB is added to rap. There is a kind of party music type that shakes temples, legs and steps. It is a popular party for young people! (Very successful in Europe, America and Korea! In a word, Hip Hop is a kind of comprehensive style music mainly composed of electronic dance music and RNB, which is more suitable for many people's gathering occasions. And rap, rap is simple, music is simple.