The world is in a state of climate emergency, a ‘code red’ for humanity. The twin climate and biodiversity crises demand urgent, co-ordinated action to transform existing social-technological systems. Simply accelerating what we are doing now cannot avert the most catastrophic impacts of climate change. As Secretary-General António Guterres stated in his opening remarks at COP27, we need “a Pact in which developed and emerging economies unite around a common strategy and combine…