When did Western statecraft lose its fear of the unknown?

The recent Ukrainian drone strike deep inside Russian territory, witnessed by a burning oil refinery near the Kremlin, marks a significant shift in Western statecraft. Unlike during the Cold War, when the unknown posed significant risks, Western leaders responded with quiet endorsement rather than fear. This suggests a new level of strategic confidence and a willingness to confront potential risks without the traditional hesitation. Such a shift has major implications for global security dynamics and the future of international relations.