Totally agreed. I also liked some of the anecdotes in this article, but I always have to do an eye roll when I read an article that claims that "primitive" cult

Totally agreed. I also liked some of the anecdotes in this article, but I always have to do an eye roll when I read an article that claims that "primitive" cultures don't suffer from disease X, and look they do thing Y that modern cultures don't, so of course thing Y must be the the reason for the difference! Conveniently ignoring the 6387 other stark differences in culture, behaviors and diets between the cultures. I think the hypothesis of how sleeping positions affect back pain would be worth studying, but that's all it is, a hypothesis.