This book was begun in Berkeley and completed in Charlotte, and the research was supported in part by a grant from the National Science Foundation. It was a long time developing, and I’d like to thank the people who read and commented on it in various forms, in part or as a whole: Deborah Weiss, Ken Korey, Amos Deinard, Phyllis Dolhinow, Jonathan Beckwith, Alan Goodman, Jim Moore, Vincent Sarich, Phillip Johnson, Rika Kaestle, Debra Harry, SarahTishkoff, the participants in the 1999Wenner-Gren symposium called “Anthropology in the Age of Genetics,” and Regula Noetzli. Thanks as well to my editors at the University of California Press, Howard Boyer and Naomi Schneider.