ALAN C. SWEDLUND is Professor and Chairman of the Department of Anthropology at the University of Massachusetts, Amherst. He co-authored Demographic Anthropology with George Armelagos. Mr. Swedlund has also written a number of articles which have appeared in the Annual Review of Anthropology, the American Journal of Physical Anthropology, the Yearbook of Physical Anthropology, and Human Biology. He is currently researching the relationship between social class and health for an upcoming book.GEORGE J. ARMELAGOS is Professor and Chairman of the Department of Anthropology at the University of Florida, Gainesville. Besides being co-author of Demographic Anthropology, he also co-authored Consuming Passion: The Anthropology of Eating and Paleopathology at the Origins of Agriculture. He has also written articles for Science, the American Journal of Physical Anthropology, and American Anthropologist. Mr. Armelagos served as President of the American Association of Physical Anthropologists.