In this manifesto for change, one of the world's pre-eminent designers explores how buildings and cities around the world lost their soul - and what we can do about it. Thomas Heatherwick shows how design has a profound effect on our mental and physical health, the climate, as well as the peace and cohesion of societies. He shows how a flawed idea of utility and 'efficiency' has engulfed our towns and cities and hardened into a form of bland minimalism. But it doesn't have to be this way: there are other ways to build - with the power to lift our spirits, engage and connect us. Heatherwick draws on his own work, the ideas of other experts in the field, and recent advances in neuroscience and cognitive psychology to offer both a case against the inhumanity of modernist design and a rallying cry to everyone to imagine the world anew.