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[2] Although migration, and “immigration” – or the movement to a new country, is a common feature of the 21st-century globalized economy, mass human migration is not limited to modern times. Rather, it is a continually recurring development in human societies. Human migration began with the movement of Homo sapiens throughout the African continent 150,000 years ago, out of Africa 80,000 years ago, and into Asia and Australia 40,000 years ago. Since those first prehistoric migrations, human history the world over has continued to be a story of movement. Traditional history books invariably feature maps of different times showing arrows representing mass migrations. In fact, the history of virtually every part of the world, besides the original site of human evolution in Africa, is tied up with migration.
[3] Of course, economic development has brought a whole new impetus for human movement, as well as the methods of transport that facilitate it. Beginning with the industrial revolution, people migrated from the countryside to cities to work in the new factories (migration within a country is often called internal migration). This movement marked the beginning of an ever-increasing trend of economic migration, in which people move in search of better employment opportunities or better wages. And today’s global economy, it is unsurprising to find groups of hard-working immigrants remitting money home, where job prospects are slimmer and lower paying.
[4] Migrating in search of employment is only one of what is known as “pull” factors in migration theory. Pull factors are those attractive aspects of a destination country – or region – that are appealing to migrants. Of course, employment and money are common pull factors, but so is an overall higher standard of living. This explains, in part, why much human migration takes place from less developed to more developed economies or regions. The reason seems obvious: people go where life is better (or perceived to be better, since migrants face a whole new set of obstacles in their new homes that they may not have anticipated). It is not only immediate job prospects that are attractive but also an education that can enhance future employment opportunities. A better standard of living may include pull factors related to health and safety; for example, many people resettle for better medical care and overall greater safety for life and person.
[5] Jobs and money are economic factors in migration. But the idea of safety leads us into other general reasons for migration. Safety may be related either to environmental factors, or socio-political factors. That is, migrants may see their destination as providing an environment that is more stable and safer than the one they are leaving, or they may be seeking a political system that is less arbitrary or authoritarian, with greater assurances of civil liberty and basic protection. But it is wrong to think that migrations take place only out of a sense of urgency about security; consider the mass of North American senior citizens who, in their retirement, choose to migrate to locations with warmer weather. It’s not that their life is at imminent risk in a place with four seasons, but simply that they prefer sunnier climes. Of course, implicit in any decision to migrate is a comparison between two places: seeking a place of greater freedom, or better weather, means escaping a place of lesser freedom, or worse weather, which brings us to “push” factors in migration.
[6] Push factors are those related to the area or country that a migrant is leaving. That is, they are aspects of a place that make people want to leave it (in some cases, they are forced to leave). Many push factors are economic, including a lack of job opportunities and rampant inflation. Others may be socio-political, such as cruel or authoritarian governments, leaders, or political systems that mistreat their citizens or rely on torture and repression to inspire fear. Environmental push factors may include natural disasters, or the possibility of them, including tropical storms, earthquakes, floods, and drought. Still, other factors may be cultural.