Young people constitute one-quarter of the world's population, and one-third of the population in developing nations. They have demonstrated their vision for the world as citizens and partners in development, as voters, and as activists, which signals a vibrant and hopeful resource for the world. Yet, young people do not benefit equitably from development outcomes. In the global north, they are poorer than their parents' generation. In the global south, the dividends of economic growth are not adequately reaching them. Young people also face challenges in participating in decisions that...