Inbreeding among polygamists along the Arizona-Utah border is producing a caste of severely retarded and deformed children
Interesting article about another cult where the leaders are controlling all marriages. Some differences between FLDS and UBF: Instead of recruiting new members, they bear children (the growth rate will be probably similar as in UBF). UBF has so far only spiritual inbreeding, not biological. Nevertheless the UBF leaders ordered abortions to solve their problems, something that FLDS refuses to do.