Urban centers, which are now the dominant point of concentration for the world population, are a micro-cosmos of global and national developments and challenges. Livable, attractive, functional and socially balanced cities and neighborhoods are more and more becoming the foundations for the social cohesion of whole societies. The neighborhood is a determining factor for the quality of life as well as opportunities in life for families and individuals. However socially balanced cities, towns and neighborhoods are more and more jeopardized, while in other cities there is still potential for improvement. The concept/program “Social City” has been introduced in 1999 in Germany as one cornerstone of urban development planning to consolidate and upgrade structurally, economically and socially disadvantaged cities and neighborhoods to guarantee more intergenerational justice, equal distribution, social mobility and the emergence of citizenship.