That’s been the entire problem with Obama’s foreign policy and with the Powell Doctrine from the beginning -- most problems are complicated. That’s why they’re problems. Unless you have an enemy who’s read the script, like Saddam in 1990, the result of your doctrine is going to be doing a lot of nothing. When you’re the superpower, nothing feeds disaster. Nothing in Syria fed the Islamic State (ISIS), which grew and metastasized until it massacred Yazidis and beheaded the American journalist James Foley, and thus couldn’t be ignored any more.