Why do people - gay or straight - need the state's permission to marry? For most of Western history, they didn't, because marriage was a private contract between two families. The parents' agreement to the match, not the approval of church or state, was what confirmed its validity.

Deciding together to have a child and sharing in child-rearing do not immunize a marriage. Indeed, collaborative couples can face other problems. They often embark on such an intense style of parenting that they end up paying less attention to each other.

Using the existence of a marriage license to determine when the state should protect interpersonal relationships is increasingly impractical.

Stephanie Coontz Quotes