The following are Six Characteristics of a Healthy City outlined in Len Duhl's book, "The Social Entrepreneurship of Change": Healthy cities/communities have a sense of history to which their citizens relate and upon which their commonly held values are grounded. Healthy cities are multidimensional...and have a complex and interactive economy. Healthy cities strive for decentralization of power and citizen participation in making decisions about policy. Healthy cities are represented by leadership that focuses on the whole of a city and can visualize both parts and "wholes" simultaneously. Healthy cities can adapt to change, cope with breakdown, repair themselves, and learn both from their own experience and that of other cities. Healthy cities are those that support and maintain their infrastructures.