"This theory doesn't receive enough attention. It makes perfect sense!"
No, it doesn't. It has been debunked. It has no evidence to back it up and the think Morris talks about can be explained in other ways. Eg: we are hairless but most aquatic mammals are not. (aquatic mammals have evolved 31 times, 28 with hair, 3 without ). We evolved hairlessness to cope with the heat - it allows us to hunt better by running for long periods. It also help rid us of parasites.