Tom Sutcliffe asks whether it's better to lead from the front, or advise from the side-line. The Deputy Chairman of Saatchi & Saatchi, Richard Hytner celebrates the latter: those who wield influence and authority away from the limelight. Heather Rabbatts has experience of being a Deputy and a Chief Executive in both politics and business. The academic Archie Brown looks back at the history of political leadership and questions whether strong leaders are the most successful and admirable, while Tony Blair's former chief of staff, Jonathan Powell turns to Machiavelli's The Prince for a primer on the art of government. Producer: Katy Hickman.