With defeat looming, Putin is trotting out a new strategy: He will annex Ukrainian territory and then threaten to use nuclear weapons if the Ukrainians and their allies in the West don’t let him get away with it. If the West were to give in to his nuclear blackmail, what would stop him from announcing tomorrow that Kyiv is also Russian territory (which he clearly believes)? Or Tallinn? Or Tbilisi? Or even Warsaw or Helsinki? We cannot live in a world where an evil dictator can redraw international borders at will with threats of nuclear annihilation. And we don’t have to.