Andrew Shryock is Associate Professor of Anthropology at the University of Michigan. He is the author ofNationalism and the Genealogical Imagination: Oral History and Textual Authority in Tribal Jordan(UC Press) winner of the Middle Eastern Studies Association's Albert Hourani Award, among other books. Daniel Lord Smail is Professor of History at Harvard University. Among his books isOn Deep History and the Brain,a finalist for theLos Angeles TimesBook Prize in Science and Technology.