I was reading the Jordan Peterson AMA on reddit and he cited this link. I checked it out and it's interesting. It parallels something else I was reading about economic mobility.
In short, poor people and high school educated people are more likely to think marriage is obsolete than wealthier people or college educated people.
I'm always interested when something is being bandied about as common sense but then the data suggests that the biggest believers are people whose advice is generally not sought after for important decisions.
http://www.pewsocialtrends.org/2010/11/18/iii-marriage/
Anyhoo, I think marriage is an important institution.