Matthew T. Kapstein, Ph.D. (1987), Brown University, is Professor emeritus at the École Pratique des Hautes Études, PSL Paris Research University, and Numata Visiting Professor of Buddhist Studies at the University of Chicago. He has published widely in the fields of Indian and Tibetan Studies; his works include The Tibetan Assimilation of Buddhism (Oxford University Press, 2000).Charles Ramble, D.Phil. (1985), University of Oxford, is Professor at the École Pratique des Hautes Études, PSL Paris Research University. His publications include numerous works on Tibetan and Himalayan religion and social history, including The Navel of the Demoness (Oxford University Press, 2007).