Urban revitalization is a long process, and social innovations can crucially contribute to its success. 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. That is why local and civil society-based innovative initiatives should be encouraged and supported.<br> <br> <br> <br> This book looks at bottom-up actions, where residents and local organizations took charge, taking risks to improve their living conditions and to b