Originally Posted by
mundame
Well. Go back to the basics.
Why marry at all? Africans don't marry; indeed, they mostly do prostitution, if you read about those systems, and the women take care of any resulting children, assuming they or the children survive. Primitives in various areas don't marry in our sense --- Australians, New Guineans, etc.
In Roman times marriage was wholly a state issue, and was about heirs and property and money and so on. Augustus famously nagged aristocratic young men of Rome to marry and beget -- they weren't at the time. Rome was extremely tolerant of religion, at least till one religion used that tolerance to take over entirely and force the other religions out, and religion was not a basis for marriage at all.
Marriage wasn't a Christian sacrament till sometime in the Dark Ages. It was quickly challenged by early heresies (no marriage, no begetting or sex in some cases, or orgies, depending on the heresy).
Because of strong Christian roots this American government could until the 1960s rely on marriage for distributing social security and all sorts of legal issues of inheritance and so on. Now, obviously, that is dying out. In our lifetime! Big thing to happen, really.
The government could stop ALL entitlements based on marriage: it's the only sensible response to the DOMA problem, in which some states call homosexual unions "marriage" but the government doesn't give one of the pair spousal benefits.
Marriage stabilizes any state: without it, men gather in male packs in coffee houses or the street corners and get into trouble and do no work, like in Afghanistan and Africa and so on. With marriage, men are productive and repopulate the state. It's a way to harness male energies. Without marriage, women raise all the children by themselves, as in Africa, and everyone is poorer. There's no inheriting, there's nothing to inherit.
So the state wants marriage for general prosperity, but I think that ship has probably sailed.