Diarmaid Ferriter is one of Ireland's best-known historians and is Professor of Modern Irish History at UCD. His books include The Transformation of Ireland 1900-2000 (2004), Judging Dev: A Reassessment of the life and legacy of Eamon de Valera (2007), Occasions of Sin: Sex and Society in Modern Ireland (2009) and Ambiguous Republic: Ireland in the 1970s (2012). His most recent book is A Nation and not a Rabble: The Irish Revolution 1913-23 (2015) He is a regular broadcaster on television and radio and a weekly columnist with the Irish Times. In 2010 he presented a three-part history of twentieth century Ireland, The Limits of Liberty, on RTE television.