For the selfish profit and personal gain.
The slave traders who sold slaves to slave owners.
At slave-auctions, which were widely advertised
No, slavery existed in Africa before Portuguese traders arrived. However, the transatlantic slave trade expanded the scale and brutality of slavery in Africa.
Slave traders, slave drivers, owners... there isn't rly a specific name.
Slavery in West Africa started as early as the 7th century. Slavery in West Africa reached it's peak when slave traders would trade slaves for use in the Americas.
African slave traders
Jews dominated the slave trading industry http://www.jewwatch.com/jew-slavery-folder.html
Slaves were brought to Jamestown in Virginia by Dutch slave traders in 1619. This was the beginning of slavery in the American colonies.
southern slave owners and northern slave traders banded together in the congress to strike out this PASSAGE ON SLAVERY.
Economically, slavery was a boon to many. First, African tribesmen captured other blacks and sold them to European slave traders. The capturers benefited financially from these transactions by receiving gold, silver, weapons, etc... The slave traders loaded up shiploads of slaves and sold them to slave owners, receiving money in return. The slave owners benefited from slave labor for the life of the slave without having to pay a salary.
From slave traders in central Africa
The West African societies were very much afraid of the slave traders that came to their homeland. There was much fear and hiding whenever the slave traders were around. The people had to go into hiding to survive.