JOHN N. CLARKE is Humanitarian Liaison Officer in the Bureau for Crisis Prevention and Recovery (United Nations Development Programme, New York) and Post-Doctoral Fellow, Yale University. He has previously served as an Advisor in the Early Warning and Contingency Planning Unit of the Office for the Coordination of Humanitarian Affairs (OCHA) at United Nations Headquarters, New York, where he developed and oversaw the Unit's approach to and production of early warning analyses as well as issues related to the prevention of violent conflict. From 1999-2000, he served as a Policy Advisor to Canad...