In a move that tests the boundaries of postwar diplomatic norms, President Trump has invited Vladimir Putin to the G20 summit in Miami — a gesture that reframes Russia not as an isolated aggressor but as a potential interlocutor, even as Ukraine's wounds remain open. The invitation breaks from the Western consensus that has defined international engagement with Moscow since the 2022 invasion, and places allied nations in the uncomfortable position of either accepting Putin's presence at the table or fracturing the summit's unity before it begins. History has long wrestled with the tension betw