Writing in his cell as a political prisoner in fascist Italy after World War I, the philosopher Antonio Gramsci famously declared: “The crisis consists precisely in the fact that the old is dying and the new cannot be born; in this interregnum a great variety of morbid symptoms appear.” A century later, we are in another interregnum, and the morbid symptoms are everywhere. The US-led order has ended, but the multipolar world is not yet born. The urgent priority is to give birth to a new multilateral order that can keep the peace and the path to sustainable development.