Certainly we should deplore the Russian military intervention in Ukraine and the suffering in the East of that country, but is it worth risking a high likelihood that millions of people will die because the West ends up in a war with Russia? No. How can we save thousands of lives by a war that will kill millions? Yet we are running precisely that risk if we allow Ukraine to join NATO. This will mean that the West will have a duty to go to war with Russia if the Russians refuse an ultimatum to back...