As the West struggles to define its strategy in Ukraine, politicians on both sides of the Atlantic have long insisted that the only path to a “just and lasting peace” is to support Ukraine until Russia unconditionally admits defeat. They dismiss calls for a negotiated settlement as naive, dangerous and futile, claiming that Russian President Vladimir Putin will not relent unless stopped by force of arms — Ukrainian or otherwise. More than two years into the conflict, Western leaders remain unfazed in their commitment to Russian military defeat, even as the fighting tilts decidedly in Moscow’s favor. The West’s continued...