The cities of the world stand at a crossroads. Amidst radical social, economic, and technological transformations, will the city become a driving force of creativity, diversity, and sustainability, or will it be a mechanism of inequality, despair, and environmental decay? At this critical moment, where do the stakes lie and what are the agents of change? From the time of its birth, the city has been held together by the commons. The book includes essays by Alejandro Zaera, Hyungmin Pai, Maider Llaguno, Nerea Calvillo, Hyewon Lee, Lindsay Bremner, Alex Ivancic, Iñaki Abalos, Charles Waldheim, David Gissen, Carlo Ratti, Daniele Belleri, Antoine Pico, Saskia Saseen, Adam Greenfield, Jesse LeCavalier, Philip Rode, Duncan McLaren, Julian Agyeman, Gunter Pauli, Gramazio and Kohler, Mario Carpo, Dirk E. Hebel, Marta H. Wisniewska, Felix Heisel, Mitchell Joachim, and Christian Hubert.The first publication of the Seoul Biennale of Architecture and Urbanism 2017, proposes a framework that sets basic commons? an evolving network of agencies, resources and technologies? as the critical issue in the move towards a sustainable and just urbanism. It shows an exploration not of distant utopias, but of the very near future, because the emerging commons is changing the way we connect, make, move, recycle, sense, and share, and the way we manage air, water, energy and the earth. Whether met with fear or hope, they will very soon change the way we live in the city.