Baroness Onora O’Neill presents a special Gifford Lecture in Memory of Professor Susan Manning (1953-2013), entitled 'From Toleration to Freedom of Expression'. This lecture is part of the University's Gifford Lecture series. For more than a century, the Gifford Lectures have enabled scholars to advance theological and philosophical thought. Recorded on 28 October 2013 at the University of Edinburgh's Playfair Library Hall.