Quote Originally Posted by zia View Post
One of my readings -- which I of course can't find now -- indicated that the prevalence of Morton's Foot had increased dramatically over the past several hundred years. It used to just be 5% of the population, but now it's 25%.
I have a big issue with their statistics and sample populations. (never mind the impossibility of that kind of dramatic genetic change in so few generations!!!!)

If you look at the British Isles, the incidence of Morton's Foot has decreased dramatically over history; as the Celts were overwhelmed by the Anglo-Saxons. (from 100% to whatever it is today)

Morton's Foot is like blonde hair. The incidence of blonde hair has dramatically increased in the Americas in the past several hundred years. And not because people were spontaneously mutating!