OK Mo, it's a deal. All white Africans can come to the US and Britain, we need more productive citizens immigrating to our shores instead of the usual rabble.
Our compensation will be as follows: To compensate Africa for the slaves that were brought from our shores, we will return all descendents of those slaves to your continent. You will be expected to provide transportation of course, since we already paid their way over here. You'll have to check the going prices for slaves in Sudan in order to determine the actual value of such compensation.
After that, we'll stay out of Africa as long as you all stay IN there. After you've resorted to cannibalism, and reduced the population to the carrying capacity of the land, perhaps there will be enough left for you to start all over in the stone ages again.