Utah has a subculture of various polygamist groups. The ones that have fascinated the public lately have been based on religious beliefs. This particular one is secular and uses martial arts as the unifying guide for its group identity. I’ve heard there are also lesbian polygamist groups that basically keep the husband as basically the stud for a community of women. It is interesting to see these non religious types get media attention.
Well, groups like this don't rise up in a vacuum. Utah has LONG been home to upwards of 25,000 people involved in polygamous families. So, my guess would be that if you check some of the people involved re: their genealogy you'd find polygamy in their Utah family history.