Urban revitalization is a long process, and its success depends on social innovations. Just as with technological developments, it is almost impossible to predict which social innovations will be effective. Only in retrospect can we say, something special has happened here - and it's been going on for a long time."The Challenge of Social Innovation in Urban Revitalization" looks at bottom up initiatives, where residents and local organizations took charge and took risks to improve their living conditions and to build a new future. The book presents case studies of a series of initiatives which have borne fruit over a long period of time: the revitalized industrial areas of Montreal, those of Mondragon in the Basque country, the Eldonian projects in Liverpool, the search for urban scenarios in Jerusalem, as well as cases in Nicaragua, Peru, France, the Netherlands and EU-wide projects.