Give detailed information about the 'Slave Trade in Africa'?

1.       Selling slaves was the main trade in Africa.
2.       Portuguese traders were the first to take the African slaves to their nation.
3.       Arabian traders also used to sell the African slaves on the large scale to Western Asian countries.
4.       Taking advantages of backwardness of African people, European used to make the people quarrel and battle among themselves for catching the slaves.
5.       The African people who were caught were sold on slaves.
6.       Slaves were hard working for their masters.
7.       Slave's trade was one of the reasons for colonialism.

8.       Inhumanity, cruelty and injustice were behind the slave trade.