The Magnum photographer took one of the most powerful photographs of the twentieth century - the “tank man” in Tiananmen Square, Beijing, 1989. From his insightful position as a photographer, Franklin explores why we are driven to visually document our experiences and the world around us. He focuses on photography but traces this universal need through art, literature and science. Looking at photojournalism, war photography and work recording our culture, Franklin identifies some of its driving impulses: curiosity, outrage, reform and ritual; the search for evidence, for beauty, for therapy; and the immortalisation of memory. Chaired by Oliver Bullough.