What if the Black Plague had killed off almost all Europeans? Then the Reconquistanever happens. Spain and Portugal don't kickstart Europe's colonization of other continents. And this is what Africa might have looked like.
The map – upside down, to skew our traditional eurocentric point of view – shows an Africa dominated by Islamic states, and native kingdoms and federations. All have at least some basis in history, linguistics or ethnography. None of their borders is concurrent with any of the straight lines imposed on the continent by European powers, during the 1884-85 Berlin Conference and in the subsequent Scramble for Africa. By 1914, Europeans controlled 90% of Africa's land mass. Only the Abyssinian Empire (modern-day Ethiopia) and Liberia (founded in 1847 as a haven for freed African-American slaves) remained independent.
This map is the result of an entirely different course of history. The continent depicted here isn't even called Africa  but Alkebu-Lan, supposedly Arabic for 'Land of the Blacks' . That name is sometimes used by those who reject even the name 'Africa' as a European imposition. It is therefore an ideal title for this thought experiment by Swedish artist Nikolaj Cyon. Essentially, it formulates a cartographic answer to the question: What would Africa have looked like if Europe hadn't become a colonizing power?
To arrive at this map, Cyon constructed an alternative timeline. Its difference from our own starts in the mid-14th century. The point of divergence: the deadliness of the Plague. In our own timeline, over the course of the half dozen years from 1346 to 1353, the Black Death  wiped out between 30 and 60% of Europe's population. It would take the continent more than a century to reach pre-Plague population levels. That was terrible enough. But what if Europe had suffered an even more catastrophic extermination – one from which it could not recover?
To read more - http://bigthink.com/strange-maps/africa-uncolonized