Forget OPEC. The Chinese Communist Party calls the shotsPhotograph: Getty ImagesTHE IRAN war has caused the largest supply shock in petroleum history. Yet even when fighting was most intense, oil prices never reached the $150 a barrel many analysts had predicted at the start of the conflict. For this, thank a few governments. Soon after Iranian munitions made the Strait of Hormuz unpassable, trapping 14m barrels a day (b/d) of crude inside the Gulf, petro-monarchs in Abu Dhabi and Riyadh directe...