Best piece I've read about the aftermath of the Paris attacks thus far, by Adam Shatz. Deep thinking throughout but I think this is one of the important points:
In a recent interview with Vice, Obama described IS as a child of the Iraq war. It’s true that if it weren’t for the dismantling of the Iraqi state, and its replacement by a Shia-dominated sectarian system, IS would probably not exist. And in its war against the Sykes-Picot frontiers, IS has paid a peculiar homage to the neoconservatives who have always viewed the post-Ottoman borders as artificial constructs, a map to be redrawn in blood, with multi-confessional states replaced by ethnically exclusive, weak statelets: Christian Lebanese, Kurdish and Shia.
But the problem of IS can’t be laid exclusively at the door of Bush, Blair et al. The war in Libya, and Obama’s accommodation with the Sisi regime in Egypt, have encouraged the spread of IS well beyond Iraq. It is, however, the US’s dangerously incoherent Syria policy that has perhaps done the greatest damage. When Obama called for Assad to step down, apparently confident that his days were numbered because an American president had said so, he raised the expectations of the opposition that the US had their backs, in the event that Assad began firing on them. But Obama had no intention of sending troops, or imposing a no-fly zone. His determination to will the means for Assad’s removal has never matched Russia’s or Iran’s determination to keep him in power. The result was to leave the Syrian opposition exposed to Assad’s war.
But read the whole thing.