When it comes to the war in Ukraine, about the only thing that’s certain right now is that the fighting and destruction will continue.Vladimir Putin remains fully committed to bringing all of Ukraine back under Russian control or — failing that — destroying it as a viable country. He believes it is his historical destiny — his messianic mission — to reestablish the Russian Empire and, as Zbigniew Brzezinski observed years ago, there can be no Russian Empire without Ukraine. Both of us have dealt with Putin on a number of occasions, and we are convinced he believes time is...