Defeats, cheaper oil, the ganging up against it by other Sunni Arab countries and groups, all will eventually cause the demise of this particular group and its leaders. With the end of Islamic State will not come stability in the Middle East, for it is as much a parasite upon instability and conflict as it is a cause of it, nor will it bring the end of jihadi terrorism: others will try to take its place, and both the knowledge and the wherewithal for terrorist violence are too widespread simply for it to disappear.
