Harvard professor and political philosopher Michael Sandel delivered a lecture at Duke University on the moral and ethical dilemmas embedded in contemporary issues such as income inequality, affirmative action, same-sex marriage, torture and terrorism.

The author of a new book, Justice – What’s the Right Thing to Do?, Sandel spoke at 5 p.m. on Tuesday, Nov. 3, at Duke’s Sanford School of Public Policy.

The lecture and book signing in the Sanford Building’s Fleishman Commons were free and open to the public.

Sandel aimed to show "how contemporary public debate can be deepened and enriched by an engagement with some of the big ideas of political philosophy."