With nation states seemingly paralyzed and unable to grapple with the challenges of the 21st century, cities have become vital crucibles of policy innovation. In “Renegade Cities,” World Policy Journal explores key ideas emerging out of the world’s urban areas. The issue reveals how urban communities have used the informal economy to cope with environmental threats, income inequality, and competition for scarce resources. Instead of imposing top-down policies that facilitate state control, authors argue that governments should build up homegrown settlements and strengthen their ability to creatively manage themselves. There is no single, context-free solution to the problems of the city, but residents themselves need to be part of the answer.