The theory of an African genesis for modern humankind is one of the most controversial in science, and states that all of us are descended from one race that emerged from Africa 70,000 years ago, replacing all other human populations. It is therefore based on a revolution in the history and anthropology of early humans, and in this book the theory's most forceful advocate - Dr Stringer of London's Natural History Museum - explains the evidence for the new view of our species' origins.