Unprecedented challenges await the future of the world's cities. Accelerating population pressure, climate change, food insecurity, poverty and geopolitical instability – in the face of such problems our current attempts at producing a sustainable agenda for the world's cities appear fragmented and inadequate. Fresh thinking is needed. In Remaking Cities, renowned design theorist Tony Fry brings a conceptual design perspective to the challenge of urban sustainability and resilience. In a typically far-sighted and provocative work, Fry presents ideas and actions for 'metrofitting' – a new kind of practice in architecture and urban design. Metrofitting expands the technological concept of retrofit up to the city scale, placing social, cultural, political and ethical concerns at its heart. Metrofitting is not about visionary technology, it is about transforming existing cities by combining available resources with human creativity, prompted by new thinking about new and old urban problems. It requires overcoming outmoded Eurocentric assumptions of what constitutes a city, rethinking their forms and structures, and understanding their metabolic processes and social and economic functions. This book provides conceptually strong practical approaches that will ultimately change the whole way we view cities and the way the urban future is designed. Illustrated with international case studies of metrofitting in action, Remaking Cities will provoke and stimulate debate among architects, urban designers, and anyone concerned with the urban environment and social and cultural change.