A prohibition on cohabitation, effectively Mormon polygamous marriages though not saying so, has been overturned in a court.

There is a secular polyamory community, which I support. We believe that polyamorous relationships are legitimate; we know they can be happy, and don't lead particularly to problems. I see no valid grounds for the prohibition that was just overturned.

However, the critics of Mormon polygamy say it is a system of oppression of women and children. Are they right? If so, how can those facts be reconciled with secular polyamorous experience? Are these relationships bad in a hidden way? Is there a crucial difference, that causes secular polyamory to have better results than Mormon ones? Is it a matter of different ways of judging whether a relationship is good or bad?