This “ingenious work about the course of human history” examines why civilizations evolved so differently in the Americas and Eurasia (Kirkus, starred review). By 15,000 BC, humans had migrated from northeastern Asia across the frozen Bering land bridge to the Americas. When the last Ice Age came to an end, the Bering Strait refilled with water, dividing America from Eurasia. This division continued until Christopher Columbus voyaged to the New World in the fifteenth century. The Great Divide compares the development of humankind in the Old World and the New between 15,000 BC and AD 1,500. Combining the most up-to-date knowledge in archaeology, anthropology, geology, meteorology, cosmology, and mythology, Peter Watson’s masterful study offers uniquely revealing insight into what it means to be human.