Scott Bollens , professor of urban planning at University of California, Irvine, studies the role of urban policy amidst nationalistic ethnic conflict and democratization. He has conducted externsive field research in Jerusalem, Belfast, Johannesburg, Nicosia (Cyprus), Sarajevo and Mostar (Bosnia), Barcelona and Basque cities (Spain), and Beirut. He is author of Cities, Nationalism, and Democratization (2007), On Narrow Ground (2000) and Urban Peace-Building in Divided Societies (1999). Bollens holds the Warmington Endowed Chair in Peace and International Coooperation at UC Irvine.