Michael Sandel talked about his book Justice: What's the Right Thing to Do? (Farrar, Straus and Giroux; September 15, 2009). In this book Harvard University government philosopher Michael Sandel applies the history of political philosophy to contemporary moral dilemmas and political controversies. He urges public discussion on morality in politics as he askes, "What constitutes social justice?" Professor Sandel held a dialogue with members of the audience as he illustrated Aristotle's concept of justice. Then he responded to questions from members of the audience.