I think it's more like the tough roots and sinewy shit we don't eat while growing up, thus our jaw bone doesn't get the stimulation that encourages growth in the bone. I haven't seen anyone propose that the recent brace phenomenon is caused by change in our genes (which basically is what evolution is) rather than the change in environment (which means that our old genotypes produce phenotypes that end up being corrected with braces).
Moonside wrote
I think it's more like the tough roots and sinewy shit we don't eat while growing up, thus our jaw bone doesn't get the stimulation that encourages growth in the bone. I haven't seen anyone propose that the recent brace phenomenon is caused by change in our genes (which basically is what evolution is) rather than the change in environment (which means that our old genotypes produce phenotypes that end up being corrected with braces).