First of all, the personal feeling is the political system, which not only absorbs the original British political system, but also improves it according to its own situation, and then constantly draws favorable factors from other systems.

Then it pays attention to the economy. The United States has developed more or less in two industrial revolutions, especially the second one. After the Civil War, political unity and stability and the political and economic reform of the federal government created favorable conditions for the economic take-off of the United States in the second industrial revolution.

From 186 1 to 1865, the American civil war completely buried the decadent and backward plantation slavery, liberated the productive forces, eliminated the confrontation between the north and the south, and consolidated the unity. At the same time, the federal government has also implemented a series of socio-economic reform measures. Such as implementing protective tariff policies and reforming the financial and monetary systems. All these created favorable conditions for the economic take-off of the United States in the second industrial revolution. And made a fortune by arms in the early days of World War II.

In addition, the emphasis on education and the concept of freedom and equality of human rights have also greatly promoted the development of the United States.