[SauronOfMordor]

A powerful alliance between North America and Russia would be impregnable.

Science-fiction writer Jerry Pournelle has a set of stories set in a future where the United States and Russia decide to join together and jointly rule the world

[Savage Beast]

I can just imagine it. Skiing in Siberia! Natalie Wood look-alikes on American beaches! Caviar tastings--Ogeechee River or Caspian Sea? Kossack dancing (I might have to do a few leg workouts first)!

We may even decide to save decadent old eurosclerotic (thank you, Smorch) Europe from itself.

And once we're going strong, India and China will join the party.

As for the Islamic theocracies--they can wither on the vine or blow themselves up or do the shariah or whatever. Who cares?