The war in Ukraine is a humanitarian tragedy to be sure, but that’s not why it has commanded the world’s attention. After all, there are humanitarian crises taking place in Yemen, Syria and other countries as I write this. From a geopolitical perspective, the war is potentially a watershed moment – that is, if European politico-military unity endures, creating a new model of Europe and redefining the functioning of the global system. A secondary issue is whether China’s view of the world will change too as it either seeks a new understanding with the United States or becomes more estranged from it.