Didier Fassin is James Wolfensohn Professor of Social Science at the Institute for Advanced Study in Princeton, New Jersey, and Director of Studies in Anthropology at the École des hautes études en sciences sociales. His recent publications include When Bodies Remember: Experience and Politics of AIDS in South Africa. Mariella Pandolfi is Professor in the Department of Anthropology at the University of Montreal. Mariella Pandolfi is Professor in the Department of Anthropology at the University of Montreal. Didier Fassin is James Wolfensohn Professor of Social Science at the Institute for Advanced Study in Princeton, New Jersey, and Director of Studies in Anthropology at the École des hautes études en sciences sociales. His recent publications include When Bodies Remember: Experience and Politics of AIDS in South Africa. Mariella Pandolfi is Professor in the Department of Anthropology at the University of Montreal. Mariella Pandolfi is Professor in the Department of Anthropology at the University of Montreal. Craig Calhoun is Professor of Sociology and History and Director of the Program of Social Theory and Cross Cultural Studies at the University of North Carolina at Chapel Hill. Adi Ophir is Professor of Philosophy and Political Theory at the Cohn Institute for the History and Philosophy of Science and Ideas at Tel Aviv University. He is the author of The Order of Evils: Toward and Ontology of Morals (Zone Books, 2005) and other books.