How forgiveness works and where it came from. How it can enrich our humanity, wether or not we have religious beliefs. The former Bishop of Edinburgh and Gresham Professor of Divinity, Holloway draws on philosophers and writers such as George Steiner, Frederick Nietzsche, Jacques Derrida, Hannah Arendt and Nelson Mandela, throwing light on conflicts around the world today. He discusses his thinking with the broadcaster Joan Bakewell