John Relethford, Anthropology, has published a book chapter entitled “Biological distances and population genetics in bioarchaeology” in the book Biological Distance Analysis: Forensic and Bioarchaeological Perspectives, edited by M.A. Pilloud and J.T. Hefner (Elsevier, 2016, pp. 23-33). This chapter discusses measures of biological similarity between populations based on metric data (such as measures of the skull) and how they relate to population-genetic models of gene flow (migration) and genetic drift (random change over time). Much of the chapter reviews Relethford’s work in this area over the past 25 years.