I've heard numerous times that the only reason polytheism largely died out was because it wasn't aggressive enough in conversion and the monotheist nations were stronger. If I had a powerful pagan nation who had a supposed prophet or demigod that claimes that the pantheon is now at war with the other pantheons and/or the monotheist unbelievers, would that give the nation and its religious peers more survivability?
I suspect the various leaders would be reluctant to go to war at the claims of a single person, but if they were a respected warrior or chief or some such maybe they'd listen. Then the problem of going to war at the whims of a god, though it IS a god...
What do the all knowing men and women of the forums think?