Weaving together evolutionary microbiology, economics, military strategy, ecology, and ancient and modern medicine, author Rosen tells of history's first pandemic--a plague seven centuries before the Black Death that killed tens of millions, devastated the empires of Persia and Rome, left victims from Ireland to Iraq, and opened the way for the armies of Islam. Emperor Justinian had reunified Rome's fractured empire by defeating the Goths and Vandals...