Who was the fisrt one to start slavery in Africa?

Back in 1472 the Portugese made the first slave trade agreement for the gold and ivory market. By 1641 the African labour had enabled Virginia to become wealthy, thanks to the growing of tobacco and cotton. The poor English could work out their 7 years and go onto other lives, but the settlers didn't want to lose their strong African labour, so slavery became law.

Later, Charles II of England passed a statute that would allow Africans to be taken from Africa to the US as slaves. They were called Black Gold, because great profits were made with their labour.