The bottom line, as the youngsters gathered in Melbourne fully understood, is that the UN provides fabulous value for what the world spends on it, and that if it ever ceased to exist, we would have to reinvent it. The downsides are real, but we need to remember the immortal words of Dag Hammarskjold, the UN’s second secretary-general: “The UN was created not to bring us to heaven, but to save us from hell.”