So how would you have solved the problem of Iraq other than 'empire' as you call it?
Yamani's most famous quote is "The Stone Age didn't end because they ran out of stones."
To escape the fate of Empire, which would be very nice (one of the costs of Empire is "Gomorrah/Aztlan" as Ambrose put it here on Freerepublic recently) we have to put the Oil Age behind us. There are technically practical ways to accomplish this. (Politically a real uproar, though!) Oil use would then drop so severely, perhaps to 5% of current production (for use as a chemical feedstock), that the Arab world would no longer be of concern.