While it is true that some noble creatures such as the locally abundant Canada Goose are almost totally monogamous and mate for life, we might not want to point to them as a model of how we should behave as a society. They also like to poop all over parking lots, sidewalks, and the ground, and can be equally noisy and vicious in certain circumstances. And besides, almost all other types of animals are very non-monogamous, so there is actually more of an incentive to follow that trend if we are studying our animal friends.
However, I did run across an interesting article by a writer in Cleveland that does touch on a lot of the "artificial" hidden forces at work in societies today that insist on monogamy in humans. That article is HERE. Enjoy!