Now, at different points in history, this worked vise versa. It was a natural buffer between two beloved by God types of people. Their own white God was out for their expansion into Africa by creating this massive desert like no other on Earth. North Africa was a thriving place just 5,000 years ago, with forest, prairies, lakes and rivers, and out of the blue it dried up completely. Science cannot explain it entirely, but one explanation is that God/Goddess was out for the WHITE man from the beginning, protecting them from their worst Nature. It protected Africa for thousands of years against invasion. People need to own up to their mistakes. Although, most of the time it was there protecting the black folks from white folks. There was also possibly a snake culture, a demonic culture that existed in North Africa as well. Leaving them to disperse elsewhere either too high to care or too south to care. lol lol When God acts it's usually for many many possibilities and benefits, thus science cannot fully explain the drying out of North Africa.