How did the growth of trade between the colonies, england, and africa contribute to the rise of the transatlantic slave trade?

The slave trade not only led to the violent transportation overseas of millions of Africans but also to the deaths of many millions more. Nobody knows the total number of people who died during slave raiding and wars in Africa, during transportation and imprisonment, or in horrendous conditions during the so-called Middle Passage, the voyage from Africa to the Americas.