Explaining what William McNeill calledThe Rise of the Westhas become the central problem in the study of global history. InGuns, Germs, and SteelJared Diamond presents the biologist's answer: geography, demography, and ecological happenstance. Diamond evenhandedly reviews human history on every continent since the Ice Age at a rate that emphasizes only the broadest movements of peoples and ideas. Yet his survey is binocular: one eye has the rather distant vision of the evolutionary biologist, while the other eye--and his heart--belongs to the people of New Guinea, where he has done field work for more than 30 years.