In the autumn of 1976, Root, a family history novel written by black writer Alex Harry, was published in the United States. The author claims that after 12 years of textual research, he traces back to Quinta Kent, his ancestor of more than six generations, a black man who was taken to North America as a slave by white slave traders from the west coast of Africa, and described his life as a free man in Africa. He and his descendants suffered under American slavery, and the family was freed. As soon as the book was published, it became a popular bestseller. At the same time, it also caused the opposite evaluation and became the focus of fierce debate. Therefore, the issue of "root" is an event with high social significance and academic nature, which is worth studying and discussing.