Interesting. As far as human molecular-level evidence goes, we know that there are significant traces of Middle-Eastern farmers in North Africa (including Egypt

Interesting. As far as human molecular-level evidence goes, we know that there are significant traces of Middle-Eastern farmers in North Africa (including Egypt and the north-east), but we can also tell that Nilotic herders expanded out of Sudan, well into East Africa. West Africa is a bit complicated, although the fact that we do find a large unified language family there (the Niger-Congo-Kordofanian languages), even pre-Bantu expansion, must count for something. These accounts should be taken with a grain of salt, since the overall amount of genetic variation we find in the African continent already implies that gene flow or replacement of any sort must have been quite rare indeed - the picture we have for Africa is not nearly as sharp as the one that emerges wrt. Eurasia as a result of the dramatic expansion of Yamnaya/PIE horse herders in close-to-historical times.