It's fairly evident in circles where there are no social blocks to sexual promiscuity.
If a society had a framework so that a whole community was able to take care of the children, and the community had a mutal self interest to remain in each other's company, it is very possible. In fact mankind during the hunter-gatherer stage most likely found advantages in such a society.
Our post-industrial societies simply have been transformed too much for this to make sense. There are too many alternatives, when you want to break with your spouse it is easy, you couldn't do that when all you had was your tribe and being outside of it meant death. It is too easy for those in a hypothetical flowers-and-love commune to be tired of society and do a free love type family then get tired and want back in society.
So many things are possible and everything has advantages and disadvantages. If one clearly believes the present system they find themselves under is perfect, and any other type of system by virtue of not being their favorite, any other type is not good at all in their eyes, then they lose the chance to recognize every system has both and recognizing the advantages allows one to harness and even exploit them for success while recognizing inherent disadvantage of any system allows us to compensate and manage.
Believing your chosen system (insert political, economic, religious, marriage, etc..,) is ideal doesn't allow for growth, finding your niche, or optimal performance of your being.
Edited by Lookitisoneofthosepeople, 27 July 2012 - 07:04 PM.