The Last Hope of Socialism

The last hope of socialism for this stub of human development is might have been ended at the Trinity test site. Once you got the Cold War, a final confrontation between the Soviets and the burgeoning communist world block and Western capitalism became impossible. I do wonder if they just dropped one nuke on Kiev, what would happen. But like we also could not do nothing. So what is between nuclear retaliation and nothing that can be done if they nuke Kiev? That's why I really don't think there will be one nuke because I don't think it ends there.