Nowhere are the second-order consequences of cratering oil prices more varied, important, and unpredictable than in the Middle East. “ISIS is not as flush as it once was. It has cut spending on fuel and bread subsidies, while increasingly shaking down locals for cash. Fighters themselves may be feeling the squeeze, too.” The militant group’s revenue from selling oil had dropped to $300k per day, down from $2m a day in 2014. “I don’t think [the oil-revenue decline] will lead to [the Islamic State’s] collapse. … But it might accelerate their implosion”. Iran, meanwhile, has entered into negotiations with world powers over its nuclear program for a variety of reasons. But the fact that Iran is one of the world’s hardest-hit oil producers is surely one of them.