This book presents historical and current case studies of urban development from over ten cities, including Chicago, Leipzig, Vienna, Bremen, Amsterdam, New York, Paris, Hong Kong, Istanbul, Porto Alegre, Havana and Quito. It gives an overview of the self-organised, collective, and informal movements in urban areas. Hands-on Urbanism 1850-2012 – The Right to Green is published on the occasion of spring 2012 exhibition at the Architecture Center in Vienna.