Read Stephanie Coontz's Marriage, a History. This a quote from page 280,
The breakdown of the wall separating marriage from nonmarriage has been described by some legal historians and sociologists as the deinstitutionalizatoin or delegalization of marriage or even, with a French twist, as demariage. I like historian Nacy Cott's observation that it is akin to what happened in Europe and American when legislators disestablished their state religions.
With disestablishement, the state no longer conferred a while set of special rights and privileges on one particular denomination while denying those rights to others. When this happened, religion itself did not disappear. But many different churches and new religious groups proliferated. Similarly, once the state stopped insistence that everyone needed a government-sanctioned marriage license to enjoy the privileges and duties of parenthood or other long-term commitments, other forms of intimate relationships and child-rearing arragnements came ouf from underground. And jst as people's movetives for joining a church changed when there was no longer one official religion, so people began deciding whether or not to marry on a new basis.
We may personally like or dislike all these changes. But there is a certain inevitability about most of them. For better or worse, marriange has been displaced from its piotal position in personal sand social life. No matter how much society values marriage, it cannot afford to ignore the fact that many childern are being raised and many obligations are being incurred in alternative settings. A perfect storm has reshaped the landscape of married life, and few things about marriage will ever be the same.
Its kids and obligations that's important for me. Not a right to marriage. And the test is HHH's Liberal Mantra. A test he gave for judging Government but one we can be apply to any institution and ourselves,
One of Humphrey's speeches contained the lines "It was once said that the moral test of Government is how that Government treats those who are in the dawn of life, the children; those who are in the twilight of life, the elderly; and those who are in the shadows of life, the sick, the needy and the handicapped," which is sometimes described as the "liberals' mantra."