Providing electricity to the unlit and unstable parts of the globe is crucial to jump-starting development, improving the environment, and stabilizing fragile states that ferment many of today's security threats. Let There Be Light shows the failures of centralized electricity to meet these challenges - and describes how distributed, renewable energy such as solar and wind power can work. But, Kleinfeld and Sloan argue, it is not enough to harness the power of the elements. To scale, distributed energy must harness the power of the market. Taking on the major challenges that have impeded distributed energy's success, this book describes the roles development donors, social entrepreneurs, venture capitalists, the military, and the business world can play to make lighting the developing world a reality.