U.S. isn't readying the world for a war without any preparation.... they have played these 'iranian attempted to kill saudi ambassador' games already... they've isolated Iran as much as possible, to make sure no one comes to their aid. And since I don't need to justify how ****ing retarded saudi kings are(the reason why nato and u.s. don't have to attack and implement democracy there), and since we also know how none of the other states like Pakistan are in any position to support Iran, Iran will most likely be left alone to be slain by the muslimeaters - the true 'terrorists'.
I do have hope in North Korea though... but then again... just like in a chess game, U.S. already has a piece in front of north korea too.
So who exactly is sitting at the other end in this chess game? since the demise of Russian empire, I would say it has been left empty. However China is popularly seen as the only potential player who can stand up to U.S.. That probably is what u.s. has in mind, every time they dismantle a government. Destroy all potential Chinese friends - empower ones who submit to U.S. will. China is very much already in an 'influence' war with U.S.. The only world U.S. wants to see is a world full of its supporters/friends/slaves - so it can dictate world policies as it sees fit.