Nobel Prize laureate Professor Amartya Sen presents a lecture entitled David Hume and the Demands of Ethics.

The Professor of Economics and Philosophy at Harvard University gave his lecture as part of the University's celebration of philosopher David Hume's 300th birthday.

Professor Susan Manning chaired the event, which also featured Professor Emma Rothschild, Professor Barun De, Dr Viccy Coltman and Dr Michael Fry.

Recorded on Monday July 18 2011.