What can we do to accelerate the impact of Christianity in our cities? For the first time in history, there are more people living in cities than in rural areas. Every week 1.5 million people move into urban centers, with that number rising. Yet the church is not moving into cities as fast as the world is. For the gospel to transform and flourish in our cities, we need a global alliance not just of leaders in the church, but leaders in the nonprofit sector and the marketplace.