I recently theorized as to the origin of the high density of big hair in Utah. First let me say, that I like having big hair as much as many other women in my great state. There is nothing like having big hair that makes me feel like my face looks petite and delicate, even though most hats are too small for my big head.
Back to the big hair theory. In the olden days, it was very cold (kind of like now, except without natural gas pumped to most homes, that they might be heated to 73 even in the winter). People who wanted to come to Utah often had to experience more cold than many contemporaries by camping somewhere with thin walls, such as a tent, waiting for the spring to come, that they might travel the arduous trail west. Other people decided to come even though it was cold. Many died of exposure.*
I propose that those who had thinner hair were more likely to die of this exposure than those who had thick (conducive to volume) hair. If they died, that means they were less likely to pass the thin hair genes on to the next generation. Hence, those Utahns whose ancestors crossed the plains are more genetically disposed to big hair.
*By no means do I mean any disrespect to the pioneers and all of their faith by this post.