Why did a large number of European immigrants go to the United States at the end of 19?

At the beginning of16th century, after Columbus returned to Spain, immigrants (poor people and prisoners, etc. ) went to Central America and South America; By the middle of16th century, some French people came to Canada (Quebec). As for the United States, due to many natural disasters in the Caribbean, some Spaniards from Central America went north to Florida and started a new frontier. They should be the earliest European immigrants, and the "Mayflower" in Britain is decades later.

In addition to the army, the first people who came to the United States were prisoners (pioneers sent to the wilderness by the government), some poor people (who made a living in North America because of the war in Europe) and bourgeois upstarts (who had no social status and disagreed with those in power because they demanded more rights). Before the independence of the United States, North America belonged to the colonies of Spain, France, Britain, the Netherlands and other European countries.

In order to promote the development of this region and attract European immigrants, these countries have promulgated many preferential policies. At this time, they were in the first wave of world immigration, the slave trade began to prevail, and a large number of slaves came to the United States.

Later, the United States became independent. In order to ensure its national security, it expanded its territory one after another, occupied such a large area of land by buying and occupying, and continuously introduced preferential immigration policies. At that time, the United States was still relatively backward compared with the developed countries in Western Europe.

1. The war in Europe during World War II, the local security of the United States, the large immigration tide, the stable domestic environment and the growing economic strength are the main reasons for attracting European immigrants.

After World War II, the United States was the only capitalist superpower. European countries are far-sighted, and the United States has gradually restricted immigration and raised the immigration threshold.