You assume that the people of Iraq could not have a democracy or a constitutional monarchy or anything better than your choices given above. So first, your question is invalid because as per a liberal, you only give half the info. I should also add it’s pretty damn arrogant that you believe that Iraqis can’t have a good govt.
Well if America has done a splendid job in the Middle East, why isn't it the shining epicenter of democracy and capitalism that it should be??? History, mon ami, history. Let history be your guide. As it stands now, we are only repeating it.