People who are trying to solve tough economic, social, or environmental problems often find themselves frustratingly stuck. They cannot solve their problems in their current context; the larger system within which they are operating is too unstable or unfair or unsustainable. They cannot transform this system on their own, or by working only with their friends or colleagues; the system is too complex to be grasped or shifted by any one person or organization or sector. And other actors whose cooperation would be necessary to transform the system don't understand or agree with or trust one...