The reason why America is an immigrant country.

(1) The United States is a country that originated from immigrants.

The earliest aborigines on the North American continent were Indians.

Europeans (first of all, Britain) exiled these criminals to the United States and slowly began the process of emigrating to North America.

Mayflower brought Puritans and began to cultivate colonies.

The plantation industry in the southern United States rose and began to sell black slaves; North Korea builds railways and sells Asian workers.

During World War II, there was basically no war in the American continent (except Pearl Harbor), and a large number of refugees from war-torn areas such as Europe and Asia poured into the United States (especially Jews).

(2) From the perspective of population composition, the United States is an immigrant country.

Americans can be distinguished not only by white people, black people and yellow people.

It can also be divided into Asian, African, Jewish and even very detailed sources such as German, French, Spanish and English.

Almost every American's ancestor is a foreign immigrant.

(3) The United States is an immigrant country in immigration policy.