The private sphere provides a space for self-exploration and reflection – for organisations as well as individuals – and intimate relationships certainly require privacy. Yet the line between private and public has become ever more fuzzy. Are comments made to ‘friends’ on Facebook public pronouncements or private mutterings? Who owns the personal photos of our families, ourselves behaving badly when we publish them online? Is a culture of transparency and revelation creating a refreshingly open society or a tyranny with nowhere to hide? In this riveting debate filmed at the recent Battle of Ideas festival, an extraordinary line up of luminaries help us understand what’s going on. The speakers are: David Aaronovitch; Professor Frank Furedi; Andrew Keen; Ursula Martinez; Christine Rosenand and the chair is Claire Fox.