Actually, I was thinking, the problem is that they've had a variety of incompetant govenrments, periods of anarchy and civil war, and occasional religious nutter dictatorships. What they need is a century of a single, solid dictatorship (such as India had under British Colonial rule) to get them used to the idea of obeying the government. Said dictatorship would foster education and gradually - over a few generations - introduce democracy.
You Yanks would be happy to supply 50,000 troops for 50 years and another few trillion bucks to pay for it all, wouldn't you?
We'll send a few guys with a flag and a sharpened boomerang.