Book excerpt: This book emphasizes new ways of designing for a sustainable city and urban environment. From several angles the future of our urbanism is illuminated. From a philosophical point of view, the city is seen as an organism, following complex ecosystemic principles, shining light on indigenous perspectives to become beneficial for sustainable design and core questions are asked whether current architectural practice is really sustainable. Simultaneously concrete practices are presented for cities in transformation, focusing on green infrastructure, smart city principles and health.