Politically, America has never experienced a feudal society. Since the founding of the People's Republic of China, the separation of powers is the most thorough and thorough capitalist regime. When President Lincoln was in office, the civil war broke out in the United States (1960s). The industrial capitalism representing the north defeated the serfdom in the south, and the whole country truly realized political unity and market unity, clearing the way for the development of capitalism.
3. Economic system. In the early days, the United States completely pursued liberal capitalism, with all resources regulated by the market and rapid economic development. Until the economic collapse and Great Depression in 1930s, the United States learned a lesson, strengthened government intervention in the market, and improved the economic system (Roosevelt's New Deal).
4. National resources. At first, there were only thirteen eastern states in the United States (there were thirteen stripes on the national flag). Later, through war, merger, westward movement and purchase (cheap purchase from France, Russia and other countries), the national territory has expanded from the Atlantic to the Pacific coast. It's really vast in territory and abundant in resources, and it's very convenient with the railway arteries from east to west and from north to south. In the early stage of industrial society, resource-intensive had a great influence on industrial development.
The war is divided into three periods. Theodore roosevelt (190 1- 1909) pursued the policy of "big stick+gold dollar", and the United States basically surrendered to the United States. The middle period was World War I, and the United States participated in the Paris Peace Conference as a victorious country and divided the world. Later, after World War II, the United States became the absolute superpower in the world, and so did the Soviet Union. Unfortunately, the Soviet Union's abnormal economic development emphasized heavy industry and military affairs (which greatly influenced the founding of China) and neglected the development of light industry, which was finally dragged down by the United States.
Although the United States participated in two world wars, they were not carried out in the United States and did not harm American industrial production. Europe won't work. The whole of Europe is a big battlefield. After the war, there were ruins everywhere. The Marshall Plan adopted by the United States, officially called the European Recovery Plan, provided loans and economic assistance to promote European integration. This shows that the strength of the United States is already above that of the whole of Europe. There is also the Bresson system, which established an international monetary system centered on the US dollar.
5. The role of foreign talents. For various reasons (war, race, political persecution, etc. ), high-end talents from various fields in Europe are constantly pouring into the United States (Einstein), and the whole United States is full of talents.
Answering this question reminded me of many scenes in high school, and I was very pleased to find that my historical knowledge was not completely returned to the teacher.