What impact does immigration have on the United States?

Racial discrimination has been gradually eliminated and racial contradictions have gradually eased.

The gap between the rich and the poor is gradually narrowing, and the inequality in education is constantly becoming equal.

Even the United States, which imports the most immigrants today, has its own policies. Even though immigration has brought such disadvantages to American society, it has also led to social unrest in some ways. But it has provided huge human resources and promoted the development of the United States in many ways. Many scientists went to the United States in order to have a superior research environment.