Why did the population migrate from Europe and Asia to America between the two industrial revolutions?

The reasons for population migration from Europe and Asia to America are as follows: first, the opening of new sea routes and the discovery of the new continent, the development of European capitalism and the expansion of colonialism, and a large number of European population moved into the undeveloped vast America; Second, Europeans need a lot of labor to develop the United States, so they recruit workers from Asia to work in the United States.

International migration refers to the migration of people who cross national borders and stay for more than one year. Before the discovery of the new continent, human migration activities were mainly concentrated in the old continent. After the discovery of the new continent, there was a large-scale transcontinental migration.