Planner; lawyer; Professor Emeritus Urban Planning, Columbia University (NYC) Utopias can be good (humanist) or bad (neo-liberal), achievable (the city of plenty) or unachievable (the dream city), strategic (utopias of process) or illusory (architectural fantasies). Critical approaches to planning and urban activism would incorporate the former images of utopia into meaningful programs of change. The Right to the City is an example of the effort at such a use of utopian thinking