books.google.com - Periods of great social change reveal a tension between the need for continuity and the need for innovation. To comprehend these changes as history and as guideposts to the future, Peter F. Drucker has, over a lifetime, pursued a discipline that he terms social ecology. The writings brought together...http://books.google.com/books/about/The_Ecological_Vision.html?id=cCqwY8gJOXcC&utm_source=gb-gplus-shareThe Ecological Vision
