Professor Lord Robert Winston delivers a lecture entitled Medicine, Ethics and Society.This lecture is part of the University's "Our Changing World" public lecture series, which examines the global challenges facing society, and the role of academia in meeting these challenges: http://www.ed.ac.uk/events/changing-world This lecture is also part of the University's Enlightenment Lecture series, which examines aspects of the Enlightenment's legacy in the context of our own fraught and hectic times: http://www.ed.ac.uk/about/video/lecture-series/enlightenment Recorded on Monday 21 October at the University of Edinburgh's McEwan Hall.