All over the world, many people who live in urban areas find themselves in an arduous social situation. In the third world, people in overcrowded metropolitan areas have a problem in maintaining even the slightest standards of living. But also richer parts of the world, the United States, Europe and the far-East, show growing social inequalities in their cities. And social problems are not confined to the large metropolitan areas: impoverishment, long-term unemployment, social isolation, and the dependency on welfare programs pops up in medium-sized cities and even in smaller communities. At...