Contributor(s): Professor Justin Champion, Dr John Guy, Kwasi Kwarteng, Gisela Stuart | Is politics about building a better world, or simply the art of the possible? Ahead of this year's LSE Literary Festival which marks the anniversary of Thomas More's Utopia, in a special debate for BBC Radio 3’s flagship programme Free Thinking (@BBCFreeThinking), politicians and historians debate the balance between idealism and realism in politics, international relations and political history. Justin Champion is Professor of the History of Early Modern Ideas at Royal Holloway, University of London and President of the Historical Association. He works on political thought of the early modern period, with a particular emphasis on the relationship between politics and religion in the period between the Reformation and the Enlightenment. He is a regular broadcaster on the BBC and elsewhere. John Guy is Fellow of Clare College, University of Cambridge. He has written extensively about the politics of the Tudor Court, including several books on Sir Thomas More and his political career. He is a regular broadcaster on the BBC and elsewhere. Kwasi Kwarteng has been Conservative MP for Spelthorne since 2010. He has served on the Transport Select Committee, and is currently a member of the Work & Pensions Select Committee. He is an historian whose books include Ghosts of Empire: Britain’s Legacies in the Modern World, and Thatcher’s Trial: Six Months That Defined A Leader. Gisela Stuart (@GiselaStuart) has been Labour MP for Birmingham Edgbaston since 1997. She has served on the Social Security Select Committee, in the Government as Parliamentary Under-Secretary of State for Health, and as a UK Parliamentary Representative at the European Convention, a body established to draw up a constitution for the European Union. Gisela is the current editor of The House, Parliament’s in-house magazine. Anne McElvoy (@annemcelvoy) is Senior Editor at The Economist, a presenter of BBC Radio 3 Free Thinking and BBC Radio 4 Moral Maze, and a London Evening Standard columnist.