More at http://philosophytalk.org/shows/ancient-cynicism.

Today, the term ‘cynic’ brings to mind a person who has little or no faith in the goodness of the human race. In ancient Athens, however, it meant something quite different: one who rejects all social conventions in order to live in accordance with nature. The Cynics believed that such a life was necessary for freedom and virtue. Why did they think so? What are the most important tenets of Cynic philosophy? And are there any reasons to live now as the Cynics once did? John and Ken sincerely welcome Luis Navia from the New York Institute of Technology, author of "Diogenes the Cynic: The War Against the World."