>>15246
Disregarding the fact that he was probably referring to the ice age, Africa is rather intellectually easy. You don't have to think about long-term food supplies, you don't have to regularly migrate by the season, you don't have to build beyond the basics of shelter from cold or wet and you don't have to hunt beyond the basic instincts of man (chase animal, kill it, avoid lion). There's plenty of harshness to Africa, but not much that forces one to problem solve or think outside the box.