I'm pretty sure the Arabs said the same thing about Europe during the Dark Ages. Truth be told, we never know what will happen to the world.
Surely cancelling all the gargantuan debts of African nations would be a start to reversing the trend, though? I'm fairly sure that doesn't help, even accounting for corruption and other factors.
Africa may become developed but it will never be wealthy compared to the rest of the world as the rest of the world will get richer faster. A few African countries may become an exception but they will be just that an exception, just like how most poor people stay poor but some (very few) become rich.
As long as businessmen are selfish, Africa will remain in poverty.