Causes of Migration:
The causes of migration are varied but are almost always linked to a combination of circumstances in the home country, such as the lack of social and economic opportunities andthe perception of opportunity in the receiving country. Other causes are familiar, international conflicts, politics.
Immigration reached a much higher peak in the XX Century to North America.
NorthAmerica is a region of immigrants.
In the past 30 years, the number of international migrants has more than doubled, to an estimated 191 million worldwide[1].
These include economic migrantscompelled to move to provide for their families, refugees and internally displaced persons fleeing persecution, and victims of human trafficking. The vast majority are economic migrants who have few optionsto remain in their countries of origin. There are roughly 30 to 40 million undocumented migrants worldwide, comprising around 15–20 percent of the world's migrant population. An understanding of theforces that favor or necessitate migration is necessary if we are to maximize benefits and minimize harm to migrants, their families, and sending and receiving nations.

Types of immigrantsDecades:
1900-1910
The Great Wave of Immigration began in 1880 but exploded into peak numbers during the first decade of the century. The massive numbers of immigrants reached a cumulative total changedthe character of the entire country. From towns and farms into urban centers. This decade saw more growth than any previous decade in North America history. Because of the population growth hugesections of natural resources ere destroyed. The number of immigrants in USA was 8,795,000.
The number of immigrants in Canada was 1,500,000
1910-1920
World War I slowed immigration considerably duringthe middle of the decade.
The number of immigrants in USA was 5,736,000
The number of immigrants in Canada was 1,400,000

1920-1930
North America rose up in revulsion at the incredible pace of... [continua]

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