I think a more likely scenario is that somebody like China eventually becomes strong enough to be the new bully. The little kids will then be paying protection money to a different mob.
And the US is no longer a bully in europe or Russia... they just can not force us to do their bidding.
They still have the MIddle East , though... and they want to keep it badly....the ring to control them all and keep being a bully...but I do not think it will work...We are for a multipolar...the main and relevant variables seem very robust....only a badly managed transition from oil could change the picture...and still it will only for a more fragmented world.
A pleasure I therefore claim to show, not how men think in myths, but how myths operate in men's minds without their being aware of the fact. Levi-Strauss, Claude