Land
During the time when imperialism was taking place, Africans were colonized by diffrent contenents and it became so overwelming that they fought against each other for land and now it reflected on africa to where some parts are slums and the other parts are NOT slums. Today this reflex's back then because there is still issues with land between each other, even though africa isn't being imperialized anymore. A huge effect during this was war's and now it is just arguments with each other. Hopefully there will be a government to step up and take over.