Brendan O'Leary is the Lauder Professor of Political Science at the University of Pennsylvania and World Leading Researcher Visiting Professor of Political Science at Queen's University Belfast. He is the inaugural winner of the Juan Linz Prize of the International Political Science Association for lifetime contributions to the study of federalism, democratization, and multinational states, and was recently elected an Honorary Member of the Royal Irish Academy and to Membership of the US Council on Foreign Relations. Educated in Northern Ireland, Oxford, and the London School of Economics & Political Science he advised parties and governments during and after the making of the Good Friday Agreement. His extensive publications include Power-Sharing in Deeply Divided Places (co-editor, University of Pennsylvania Press, 2013), The Northern Ireland Conflict (OUP, 2004), and Explaining Northern Ireland (co-author, Blackwell, 1995).