Military intervention in the Muslim world seems to bring the United States nothing but grief. Afghanistan, Iraq, Libya: None looks much like a success story now.
Yet the Obama administration is edging reluctantly into a civil war in Syria, aiding rebels who are fighting to overthrow the brutal regime of Bashar al-Assad. And it should: The longer this war goes on, the worse it will be for the United States and the Syrians. Already, more than 70,000 Syrians have died; perhaps 4 million have lost their homes. The arguments against intervention are eroding fast.