From humble beginnings, Rome became perhaps the greatest intercontinental power in the world. Why did this historic city become so much more influential than its neighbor, nearby Latium, which was peopled by more or less the same stock? Over the years, historians, political analysts, and sociologists have discussed this question ad infinitum, without considering one underlying factor that led to the rise of Rome--the geology now hidden by the modern city.

This book demonstrates the important link between the history of Rome and its geologic setting in a lively,...