Joao Biehl is Associate Professor of Anthropology at Princeton University. He is the author of "Vita: Life in a Zone of Social Abandonment "(UC Press) and "Will to Live: AIDS Therapies and the Politics of Survival." His website is www.joaobiehl.net. Byron Good is Professor of Medical Anthropology in the Departments of Social Medicine and Anthropology at Harvard University. He is the author of "Medicine, Rationality and Experience: An Anthropological Perspective" and co-editor of several volumes, including "Culture and Depression" (UC Press). Arthur Kleinman is Professor and Chair of Anthropolo...