Most monogamous people have not chosen monogamy.

It’s a false premise to say that most monogamous people have chosen monogamy. Most people belong to the religion they were raised in…because that’s what’s familiar. That’s the milieu they grew up in, and, for better or worse, they’re just continuing the pattern.

– Anthony D. Ravenscroft, Polyamory: Roadmaps for the Clueless and Hopeful

http://www.goodreads.com/quotes/538877-it-s-a-false-premise-to-say-that-most-monogamous-people