From the publisher: "In this sweeping narrative of the past 150,000 years of human history, Steve Olson draws on new understandings in genetics to reveal how the people of the world came to be. ... He shows how groups of people differ and yet are the same, exploding the myth that human races are a biological reality while demonstrating how the accidents of history have resulted in the rich diversity of people today. Celebrating both our commonality and our variety, Mapping Human History is a masterful synthesis of the human past and present that will forever change how we think about ourselves and our relations with others."