The world is facing unprecedented challenges, from climate change and population growth, to political division and technological dislocation, to declining mental health and fraying cultural fabric. With most of the planet’s population now living in urban environments, cities are the spaces where we have the greatest potential to confront and address these problems. In this visionary book, Vishaan Chakrabarti argues for an “architecture of urbanity,” showing how the design of our communities can create a more equitable, sustainable, and joyous future for us all. Taking readers from the great cities of antiquity to the worldwide exurban sprawl of our postindustrial age, Chakrabarti examines architecture’s relationship to history’s greatest social, technological, and environmental dilemmas. He then presents a rich selection of work by a global array of practicing architects, demonstrating how innovative design can dramatically improve life in big cities and small settlements around the world, from campuses and refugee camps to mega-cities like São Paulo, Lima, Los Angeles, New York, Paris, and Tokyo. Lavishly illustrated with a wealth of original graphics, data visualizations, photographs, and drawings, eloquently explains why cities are the last, best hope for humanity, and why designers must, alongside political, business, community, and cultural leaders, steward the healing of our planet.