Students and instructors alike should take away from this text a broad vision of human societies beginning as sparse and disconnected communities reacting creatively to local circumstances; experiencing ever more intensive stages of contact, interpenetration, and cultural expansion and amalgamation; and arriving at a twenty-first century world in which people increasingly visualize a single global community. Students should come away from this book with a sense that the problems and promises of their world are rooted in a past in which people of every sort, in every part of the world, confronted problems of a similar character and coped with them as best they could. We adopted two themes to serve as the spinal cord of our history: "technology and the environment" and "diversity and dominance." - Preface.