Saudi Arabia's royal family has habitually confounded pessimists and optimists alike. For those who predict sudden collapse and revolution, or breakthroughs in reform and enlightenment, the kingdom is a serial disappointer. Not even 9/11, which was inspired and largely carried out by Saudi nationals, or the furious U.S. reaction to that day of horror seems to have changed the Saudi syndrome. After a period of tension and uncertainty, the family of more than 5,000 "princes" who form the governing political and commercial elite of a country that bears their name has once again regrouped and stabilized around its desire to...