Philippe Descola holds the chair of anthropology and heads the Laboratoire d'Anthropologie Sociale at the Collè ge de France. He also teaches at the É cole des hautes é tudes en sciences sociales. Among his previous books to appear in English are In the Society of Nature and The Spears of Twilight. Janet Lloyd has translated more than seventy books from the French by authors such as Jean-Pierre Vernant, Marcel Detienne, and Philippe Descola. Marshall Sahlins is the Charles F. Grey Distinguished Service Professor Emeritus at the University of Chicago. A member of the British Academy, he is the author of many books, including Culture and Practical Reason, How "Natives" Think, Islands of History, Apologies to Thucydides, and What Kinship Is--And Is Not, all published by the University of Chicago Press.