in response to a couple of points raised above:
1 - Regarding polygamy (or plural marriage or whatever it's called), if it is legal, would all parties have to agree to each new relationship? In other words, if a man who is married to one woman wishes to marry a second woman, then not only would the second woman have to consent to marry the man, but the two women would have to consent to marry each other. In that sense, those members of the LDS faith who support the concept of plural marriage also support the concept of same sex marriage.
2 - Property rights: There are plenty of other mechanisms besides marriage to set up ownership rights for things such as bank accounts, life insurance policies, real estate, automobiles etc, and for things like that, the idea of a "multiple" relationship is perfectly legal. Three people can be on a bank account, a lease, a mortgage note, etc and or trusts can be set up to include more people or more complicated relationships. There are certainly aspects of ownership that are more automatically determined if two people are married, but marriage is certainly not the only way to establish ownership rights for property.
3 - Children. I do believe that the "state" (society, whatever) has an obligation to protect children. To the extent that a "marriage" identifies to the state that there are two adults responsible for the care and protection of the children in that family, that simplifies the job of the government. If there was no "marriage" and all children had only one official parent, then if that parent died or was incapacitated, it would become the state's responsibility to ensure that the child was being taken care of. So having a mechanism such as marriage makes the state's job a little easier.
1 - Regarding polygamy (or plural marriage or whatever it's called), if it is legal, would all parties have to agree to each new relationship? In other words, if a man who is married to one woman wishes to marry a second woman, then not only would the second woman have to consent to marry the man, but the two women would have to consent to marry each other. In that sense, those members of the LDS faith who support the concept of plural marriage also support the concept of same sex marriage.
2 - Property rights: There are plenty of other mechanisms besides marriage to set up ownership rights for things such as bank accounts, life insurance policies, real estate, automobiles etc, and for things like that, the idea of a "multiple" relationship is perfectly legal. Three people can be on a bank account, a lease, a mortgage note, etc and or trusts can be set up to include more people or more complicated relationships. There are certainly aspects of ownership that are more automatically determined if two people are married, but marriage is certainly not the only way to establish ownership rights for property.
3 - Children. I do believe that the "state" (society, whatever) has an obligation to protect children. To the extent that a "marriage" identifies to the state that there are two adults responsible for the care and protection of the children in that family, that simplifies the job of the government. If there was no "marriage" and all children had only one official parent, then if that parent died or was incapacitated, it would become the state's responsibility to ensure that the child was being taken care of. So having a mechanism such as marriage makes the state's job a little easier.