Africa was self exploiting long before white man arrived there.
One tribe versus the other has been and still is its political style, losers becoming slaves to the winners of conflict, as was customary among most waring groups in the past.
That weakness was exploited by the first non-black Africans to enter there, the Egyptians, using them as slaves thousands of years ago.
More recently, during the last couple of millenia, Arab traders controlled the slave trade there, exporting and selling black Africans to any country who wanted cheap manpower and eventually in the last three hundred years black African slaves were bought and sold by Muslim Arabs to be exported to the Americas also.
As Islam took hold by pain of death in Africa, black Africans became increasingly divided between Islamic and non-Islamic African tribes, the non-Islamic ones becoming Xtianised or remaining animist as European powers moved into Africa colonising it, as Muslim Arabs had been doing for more than 1,000 years before them.
In the last 300 years, mineral wealth and other natural resources have boosted the export volume from Africa, and now China has moved in to attempt to corner the market of expoitable African wealth.
No amount of NGOs and foreign aid into Africa is going to solve its problems ever.
When African tribal groups can reach beyond traditional tribal divisionism, which have been exarcebated by firstly, Islamic religio-politics then secondly by European industrial materialism, a new and more cohesive continent of Africa may evolve.
That day is a very long way off thugh, and will remain a distant point in time as long as every other nation, philosophy and religion on Earth interferes with Africa and the African people.