Considered the father of modern American anthropology, Franz Boas introduced the relativistic, culture-centered methods and principles of inquiry that continue to dominate the field. This study analyzes the development of his thought and his contributions to racial and ethnic theory in the context of his own ethnicity and personal experience with persecution. The author focuses primarily on Boas's attempt to fuse science with political and social activism--an effort to insure that his ideological contributions to science had practical relevance to the difficult issues facing American...