The slavery has been a human practice for several millenniums, and it was practiced all over the world.
Explanation:
The slavery is something that the humans from all over the world were practicing unfortunately. This practice continued for millenniums, and it only stopped relatively recently. the period between the 13th and 17th century is a very important one when it comes to slavery, as it spread out much more and started to be practiced not just locally, but regionally and even between different continents.
East Africa and West Africa were using lot of slaves, and they were mostly enslaving people that were conquered and from weaker tribes on the outskirts. They were forcing them to work in mining, or to lift and carry trade goods. Later, they started to sell slaves to the Europeans as they saw a great economic opportunity.
In Europe itself, the slavery was mostly found in the Balkan Peninsula, were the Ottomans were forcing the people to work for them, and took large percentage of their crops and money. The European nations that became imperial powers were buying slaves from Africa, and they moved them into the Americas, thus made it international slavery, establishing the Atlantic slave trade.
Southwest Asia in this period also had lot of slaves, most of which were people that didn't wanted to accept the Islam, so people of different religious backgrounds, of numerous ethnic and racial groups, that were caught, were enslaved and treated as animals.
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Immigration is the international movement of people into a destination country of which they are not natives or where they do not possess citizenship in order to settle or reside there, especially as permanent residents or naturalized citizens, or to take up employment as a migrant worker or temporarily as a foreign worker.[1][2][3]
As for economic effects, research suggests that migration is beneficial both to the receiving and sending countries.[4][5] Research, with few exceptions, finds that immigration on average has positive economic effects on the native population, but is mixed as to whether low-skilled immigration adversely affects low-skilled natives.[6][7][8][9][10] Studies show that the elimination of barriers to migration would have profound effects on world GDP, with estimates of gains ranging between 67 and 147 percent.[11][12][13] Development economists argue that reducing barriers to labor mobility between developing countries and developed countries would be one of the most efficient tools of poverty reduction
Although there are several organizations whose sole function is to provide humanitarian aid around the world, one of the more popular ones would be "UNICEF"
There are the articles, the amendments and the preamble.
