If homosexual people--an unprotected class--can be free to marry people irrespective of gender, will polyamorous people eventually become free to marry multiple people at the same time?
The matter of polygamy is often presented as a slippery-slope argument against legalizing same-sex marriage. I'd like to know whether or not the recent SCOTUS ruling can be expected to have any significant influence on the possible future legalization of polygamy. If so, in which specific ways? If not, what are the legal arguments against it? Does it have to do with the state's/nation's interest in keeping things simple and minimising the potential for abusing artificial incentives for getting married?