Eric Abella Roth is Professor of Anthropology in the Department of Anthropology, University of Victoria, and an Affiliate, Center for Studies in Demography and Ecology, University of Washington-Seattle. He has conducted demographic anthropological fieldwork in the Canadian Subarctic, the Sudan and northern Kenya. He has published in various journals, including American Anthropology, American Journal of Physical Anthropology, Human Biology, Human Ecology, Journal of Anthropological Research, and Social Sciences and Medicine. He is co-editor of the text, African Pastoralist Systems: An Integrate...