Sir David Cannadine has taught history at the Universities of Cambridge, Columbia, London, and Princeton. He has published many books, among them The Decline and Fall of the British Aristocracy (1990), G. M. Trevelyan: A Life in History (1992), Ornamentalism: How the British Saw their Empire (2001), Mellon: An American Life (2006), The Undivided Past: History Beyond our Differences (2014), and Victorious Century: The United Kingdom 1801-1906 (2018). He has served as Director of the Institute of Historical Research, President of the British Academy, and Chairman of the Trustees of the National Portrait gallery, as well as General Editor of the Oxford Dictionary of National Biography since 2014.