I think that gay marriage should be legal, but I disagree with this. Beware of the fallacy of analogy! There is no economic incentive for a state not to allow gay marriage, there was an economic incentive for states to keep slaves. Also, it wasn't the supreme court that ended up freeing the slaves...
There was no economic incentive to ban interracial marriage either. That didn't stop many states from doing it. And there are economic disincentives to racial discrimination. That didn't stop it from being institutionalized for decades.
And I didn't say the supreme court needs to step in, I said the federal government needs to step in.
I agree with this being a fallacy of analogy, but yours is the wrong point. There is absolutely economic reason to prevent gay marriage - lower taxes for married couples, for one thing.
