How did the columbian exchange affect the lives of Europe Africa and the America?

Because so many slaves were being taken away from Africa and transported to the Americas and Europe, the African economy was declining because of it. The Atlantic Slave Trade transported millions of Africans to the New World in order to use them for agricultural labor as well as for servant work. With so many Africans gone from their homeland, the economy dwindled.

Naksan-

How coul Africa have economy when they were only tribes, and clans there believe me they had gold and everything,but haw could they have known about economy...WHEN THEY DIDN'T HAVE ONE AT ALL!