Roy Ellen is Professor of Anthropology and Human Ecology at the University of Kent, Canterbury. His recent publications include On the Edge of the Banda Zone (University of Hawaii Press, 2003), The Categorical Impulse: Essays on the Anthropology of Classifying Behavior (Berghahn Books, 2006), and Nuaulu Religious Practices: The Frequency and Reproduction of Rituals in a Moluccan Society (KITLV Press, 2012). He is a Fellow of the British Academy and a member of its Council. He was President of the Royal Anthropological Institute between 2007 and 2011.