I'm afraid that Weston-Price was particularly dishonest as regards his claims, so one can't trust them too much. First of all, he arbitrarily designated numerous tribes, with very widely differing diets, as being supposedly all equally healthy. This, in itself, is EXTREMELY unlikely as one would expect such totally different diets to produce quite different results re health.
Well, first off, the guy was a dentist from Ohio. He was not an anthropologist or an MD. That said, his book is of value. The value of his book is that he demonstrated that isolated tribes who had not eaten the "foods of commerce" as he called them, had good teeth and facial structures (things of interest to a dentist). Those (and their offspring) who indulged in sugar, flour, canned goods and the like suffered from bad teeth and poorly-formed faces. I think the problem is that people jump from this to say "Oh, the natives were the optimal peoples feeding on the optimal foods." And he was flat out wrong about some things (read his book to learn more).
Tyler, he has percentages of tooth decay (caries) for each
isolated tribe, and if memory serves, the Inuit were the healthiest and the Swiss least so, according to his statistics. The former ate mostly carnivorous fare with high percentage raw, the latter lived on rye bread and cheese as staples. It should be also noted that the Inuit have close to the stature and brain case size of Paleolithic peoples, something I think that Weston Price, DDS failed to note (again, he was not an expert on the human body).
I do concede that native tribes were much fitter than modern settled peoples, due to doing greater amounts of daily exercise, and that could offset the negative effects of a dairy-/grain-filled diet to some extent. But I rather doubt that they had the kind of health that Palaeo peoples had.
Yes, the traditional cultures were healthier than the industrialized folks, due in part to more exercise, more sunlight, less stress, etc.. But we can't look at the Paleolithic hunter-gatherers except in skeletal remains for comparison.
Finally, I will say that Weston Price dubiously reported that the widening of the upper arch of a "Mongoloid Idiot," aka Down's Syndrome boy of 16, changed his physical state (understandable) and:
"His mental change was even more marked. The space between the maxillary bones was widened about one-half inch in about thirty days. This lateral pressure on the maxillary bones was accomplished by rigid attachments to the teeth of the two sides of the upper arch. The outward movement of the maxillary bones (which form the roof of the mouth and sides of the nose) by pressure on the temporal bones produced a tension downward on the floor of the anterior part of the brain, thus stimulating the pituitary gland in the base of the brain. In a few weeks' time he passed through stages that usually take several years. At first, he got behind the door to frighten us; later, he put bent pins on chairs to see us jump when we sat down, and finally he became the cause of a policeman's coming to the office from where he was conducting traffic on the corner below to find who it was squirting water on him when his back was turned. He developed a great fondness for calling people over the telephone, wanted to borrow my automobile to take his mother for a drive, and with his arm caressingly about the shoulders of one of the secretaries, invited her to go with him to a dance. All this change developed in about twelve weeks."Gee, maybe if it wasn't a chromosomal defect, and maybe if this treatment were now in effect for people with Down's Syndrome, showing remarkable improvements, then I might be able to trust Price's work more. But alas, he was way out of his league and exaggerated quite a bit in some areas. His photos are great, and I am pleased he conducted the research he did before industry wiped out so many of these tribes. But you have to consider all of this when looking at his work.
It should be noted that Sally Fallon, founder and president of the WAPF is an English major. She is no nutrition/health/human expert either.
I would highly recommend that everyone keep the guru worship and dietary dogma to a minimum when looking for guidance on health matters.