One God = Bigger Countries?

From what I think I know about ancient peoples, it was common to recognize each other's gods as people traveled to other regions or conquered them. Gods were seen as regional and no threat to one's own gods back home. Visitors and invaders paid homage to the local gods of each region they entered. There was room for all kinds of gods all over the place. The Hebrews' original beliefs took this into account also, with the references to other gods in their writings, including the 10 commandments--"no other gods before me."

Maybe this was a major factor that help keep political boundaries small, collapsing whenever they tried to get too big. Maybe it was the claim of one universal god that allowed larger and larger governments to survive, at least in part. If a group has the same gods then they can more easily remain homogenous and see themselves as part of one group, too, no matter how big.

Reminds me of the supposedly conservative principle of "local control," "states rights" and similar thoughts. If this idea of allowing smaller groups more power eventually leads to more gods in the future (as it was in the past) would they still be in favor of it, now that the religious right is in control of the conservatives politically?