Last week – clearly and officially – the war in Syria widened to become an extraordinary regional conflict. First, Hassan Nasrallah, the leader of Lebanon's Hezbollah, formally acknowledged that his forces are indeed fighting alongside those of Syria's president, Bashar al-Assad. Meanwhile, in Iraq the confrontation between the government of Nouri al-Maliki and demonstrators in the Sunni provinces entered its bloodiest phase. And then, as the week ended, we saw the Israeli bombing of targets inside Syria. The entire region is now undergoing the most important geopolitical shift since the political map of the Middle East was redrawn after the first world war.