I think that we would be better of in this world as polytheists. I'm not saying that we should revert to the ancient ways of sacrificing animals or humans (that not all polytheists did). What I am proposing is that we should adopt a polytheistic psychology and show respect for everyones faith by acknowledging the commonalities between different faith systems and by doing so show respect, but at the same time practice one's own beliefs. I'd also propose abandoning the missionary attitude some faiths have, claiming that their way is the only true way.
If polytheism can exist peacefully in the past, why couldn't it do so now?
I don't intend any offence to monotheists, but the structure of monotheism seems to be designed to maximise control of people, and minimise individual freedoms to worship as individuals wish to. History has shown this to have been the case; (e.g. Constantine and Akhenaton).
Best wishes and respect to all.