This lecture Bunker Roy: Learning from a barefoot movement - YouTube is not about paleo/primal or anything, but it's a fine example of how conventional wisdom is often not the answer.
It's 20 minutes, and well worth the time. Watch it!
P.S. Oh, it's also not about barefoot running, which the title might make you assume.
Freakin' awesome.. Oh and I disagree with you saying it's not primal, everyone had perfect squat technique, natural feet shape, and it shows the intelligence present in 'unlearned' peoples. Caveman/primitive people does not mean neanderthal.
My favorite part was the village elder telling him how to grow things in the rocky garden spot.
That was really cool. Thanks.