The fundamental purpose of this book, therefore, is not to explore the diverse dimensions, the colorful landscapes, and the intricate movements it depicts, but to explore the political and social management processes of American society, and although the book attempts to cover as many dimensions and topics as possible, its analysis remains consistent with these themes. The development and flux of a society is inseparable from its politics and the way it is managed. It can be said that what kind of politics and social management there is, is what kind of social development there is. It is difficult to analyze and understand the United States without this logic. I just want to answer a simple HO question by dissecting the multiple dimensions of society: "Why is there an America?" This question is simple, but it is far beyond my ability to do so, and I know it well.