As to abuse in a typical 2 person marriage, yes, you're right, but this is also something that I believe society tries to deal with. There are always going to be abusive relationships, regardless of how many people are in them, but I do think that my question (opinion, whatever you want to call it), about how power and relationships change depending on the number of people involved is something to consider.

I totally agree with the fact that marriage is none of the government's business. But at the same time, we would probably want to change some tax laws and social benefits if polygamy became legal.

(I really couldn't care less if polygamy is legal or not. Yes, if there is a relationship of 5 women and 5 men, then there is no difference than traditional marriage system. But I really do wonder about what happens when you have 1 male with 10 wives, and 9 other young males with zero wives. In the past, this has traditionally lead to some form of revolutions. I haven't seen anyone actually answer this question yet, just people calling me a troll and a bigot.)