"Sharing Cities: Activating the Urban Commons" showcases over a hundred sharing-related case studies and model policies from more than 80 cities in 35 countries. It both witnesses a growing global movement and serves as a practical reference guide for community-based solutions to urgent challenges faced by cities everywhere. This book is a call to action meant to inspire readers with ideas, raise awareness of the impressive range of local efforts, and strengthen the sharing movement worldwide. "Sharing Cities" shows that not only is another world possible, but that much of it is already here.