David Reynolds, FBA, is Professor of International History at Cambridge University and a Fellow of Christ's College. He is the author or editor of ten books on aspects of twentieth-century history, including One World Divisible: A Global History since 1945 (2000) and In Command of History: Churchill Fighting and Writing the Second World War (2004) which was awarded the Wolfson History Prize. Both of these books are available as Penguin paperbacks. His most recent book, Summits, was also a six-part BBC TV series which he wrote and presented.