As the winner of the Paul Foot award for investigative and campaigning journalism is announced, Matthew Sweet re-assesses the significance of this award with Ian Hislop and the winner Andrew Norfolk, in a year the judges have described as "exceptionally strong". Matthew talks to political philosopher John Gray about his latest book and asks should we turn towards contemplation of the natural world and the non-human? And James Lasdun discusses his memoir on literary stalking with psychoanalyst Lisa Appignanesi and New Generation Thinker Martin Goodman.