Why did so many people want to immigrate to the United States before and after World War II?

The so-called American dream is the ideal that we can achieve a better life in the United States through unremitting efforts, that is, people must strive for prosperity through their own efforts, courage, creativity and determination, rather than relying on the assistance of specific social classes and others. Usually this represents people's economic success or entrepreneurship. Many European immigrants went to the United States with the ideals of the American dream. Although some people criticize the American dream for overemphasizing the role of material wealth in measuring victory and happiness, many Americans do believe that this opportunity for success cannot be found or exists in other countries in the world. Because unlike most other countries, the United States has quite a lot of economic freedom and the role played by the government is quite limited, which makes the social mobility in the United States extremely high, and anyone can reach the peak through their own efforts. From the independence of the United States to the end of 19, the vast land was uninhabited and owned, and anyone with a heart could occupy, invest and reclaim it. In the industrial revolution, the huge natural resources and advanced industrial technology in the United States made it possible for society to move rapidly, and this trend is still increasing day by day.

Historians believe that the rapid economic development and industrial expansion in the United States are not only due to the rich natural resources in the United States, but also because everyone has the opportunity to gain wealth through their own struggle. The American dream has become the main reason that attracts people from all over the world to immigrate to the United States-in the past and now. Today, more than/kloc-0.0 million people become American citizens every year, becoming the most popular immigrant place in the world.