With its unique blend of evolutionary theory, population genetics and behavioural ecology, How Humans Evolved provides students with the most contemporary and complete introduction to physical anthropology available. Robert Boyd and Joan B. Silk's modern presentation of genetics and observable behaviours in living humans and non-human primates moves beyond merely describing anthropological finds to showing students the "big picture" ideas behind human evolution. For the Fifth Edition, Boyd and Silk have updated the text to include the best of current research in the areas of genetics, behaviour and the fossil record that conveys the excitement of anthropological discovery. This new coverage reflects strengthened coverage of molecular genetics and a streamlined presentation of primatology.