“Some people would argue that we need to stop moving to cities, but this is a fantasy.” The modern city has lost its way and is now looking to the cities of the past for deliverance into a sustainable future. In the face of climate change and mass urbanization, we look at how cities can adapt. Ian Goldin is author of Age of the City: Why our Future will be Won or Lost Together and Professor of Globalisation and Development at the University of Oxford and the Director of the Oxford Martin Researc