"than that between any two populations in Africa" : i think you've worded that incorrectly, and please correct me if i misunderstand. I thought the correct ass

"than that between any two populations in Africa" : i think you've worded that incorrectly, and please correct me if i misunderstand. I thought the correct assertion was that there is greater diversity in Africa itself than occurs in the world outside Africa. What you wrote could be fooled by choosing two very proximal populations within Africa, thereby failing to take advantage of that diversity.