Three weeks into the Iran war, tit-for-tat escalations on multiple fronts have dragged the Middle East to the brink of the region-wide conflict that its governments have repeatedly warned about – and tried to avert – since Hamas attacked Israel in October 2023. Israel has launched a ground invasion of southern Lebanon in recent days, after Hezbollah entered the conflict in response to the assassination of Iran’s Supreme Leader Ali Khamenei. Iraq has been turned into a shooting range, as...