We are living with the nihilism of bombs. When Donald Trump says in relation to Iran that “we’ll just keep bombing our little hearts out”, he gives voice to the murderous puerility of his war. As with a kid pulling the wings off flies, this brutality is its own purpose. It is all means and no ends. And in this it is the logical conclusion of a process of ultraviolent futility that has been under way since the second World War. In spring 1945, the leading US economist John Kenneth Galbraith arrived in Germany. His mission was to help lead...