A successful economy in the 21st century will be one that meets the needs of all within the means of the planet - but how can it be done? Raworth explores stories from cities and enterprises worldwide that are pioneering new economic designs. What does it take to make a city regenerative? Can business be designed to distribute, rather than concentrate, the value created? Where is it happening and what are the challenges facing the front-runners? Raworth is the author of Doughnut Economics.