ABSTRACT
A human community, like a biological organism, grows by the process of subdivision.As a city grows, its structure becomes more complex and its areas more specialized. Increasing differentiation, however, involves more rather than less co-operation and interdependence. The specialized areas of the city, as the central retail business district, the industrial community, the residential neighborhood, and suburban towns and villages are all organic parts of the city, because of rather than in spite of their differentiated functions... .
