Massachusetts is not a common-law state; however, as someone who has prepared a number of deeds within the Commonwealth of Massachusetts, I would like to assert that Massachusetts does have tenancy by the entirety. I typed it often enough, after all. . . . (I’m not a lawyer, I’m a paralegal, which means mostly that I did the typing for a lot of documents.)
One of the things that I think is convenient about the way that my family structure is that we can “pass” for two married couples who happen to be close to each other, if we so choose. (Incidentally, as RexDart phrased the initial question, that sort of polygamy would not suit my family, which contains four people, two current legal marriages, and two additional primary bonds. I have no marriagelike bond to my mate’s wife, and my partners do not have such a bond to each other.)
It seems to me that with a larger number of sympathetic adults in the vicinity, a child will have someone they can trust to talk to about a variety of issues – and all four members of my family have fairly different personality traits, so it seems likely to me that any child of that family will have someone they can relate to about something.
I can talk to a hypothetical kid about the martial arts and and herpetology and music and pottery; my husband can talk about military history and tactics and play games until the end of the world; my mate can share an endless enthusiasm for trains, and build stuff in a variety of media; my mate’s wife can talk about literature and poetry, share a delight in the natural world. . . If one of our as yet unborn children develops a sudden interest in horseback riding or World War II aircraft or abstruse bits of the physics of turbulent flow patterns or the proper care and feeding of a garden, they have one or more parents available who can not only understand that enthusiasm, but share it.
I think that’s kinda cool, y’know? Setting aside the practicalities of income, the question of how many people are around to look after a child’s minor injuries, the ability to schedule around a child’s needs when there are four people there who might be able to do doctor’s appointments and t-ball games and supervising trips to the zoo, and twice as many loving parents to show up at the piano recital.
And at least we’ve got everyone covered by a legal marriage for health insurance purposes and to deal with the possibility of disaster in the absence of written wills.
I think that an actual legal system that would cover the concept of multiple marriages would have to start dealing with marriage as another example of a contract, and therefore making it negotiable. I think, much as is the case with a majority of contracts, there will be a handful of boilerplates that most people use, and the really nitpicky or atypical cases would go to a lawyer to have the contract written up.
It seems to me that if the (US) government doesn’t want to revamp things like taxation to consider households of different structure than “single” and “married dyad”, the contracts could be written such that certain provisions can only be granted to single person – like the married tax status thing. (Personally, I’d rather it be possible to file taxes as a household, with more fluid rules on what makes a household a household – whether a poly family, or a family that also supports several elderly relatives, or a commune, or whatever, but that’d be a bit hard to push. I know some poly families have done essentially this by incorporating, but I don’t see the benefits of that as being much worth the costs, personally.)
I’m long-winded again.