What part did Africans play in the slave trade according to this account?

Africans played a direct role in the slave trade, kidnapping adults and stealing children for the purpose of selling them, through intermediaries, to Europeans or their agents. Those sold into slavery were usually from a different ethnic group than those who captured them, whether enemies or just neighbors.  

Explanation:

each played a major role in ending the cold war.

answer; i believe the correct answer is (favorable balance);