"This is the first comprehensive, single-author history of the eastern Roman empire (or Byzantium) to appear in over a generation. It begins with the foundation of Constantinople in 324 AD and ends with the fall of the empire to the Ottoman Turks in the fifteenth century, covering political and military history as well as all major changes in religion, society, demography, and economy. In recent decades, the study of Byzantium has been revolutionized by new approaches and sophisticated models for how its society and state operated. The book's core is an accessible and lively narrative of events, free of jargon, which incorporates new findings, explains recent models, and presents well-known historical characters and events in new light. Two overarching themes shape the narrative. First, by projecting accountability the Roman state persuaded its subjects that it was working in their interests and thereby forestalled separatist movements. To do so, it had to restrain the tendency of elites to extract ever more resources from the labor-force. Second, the effort to sustain a common identity, both Roman and Christian, was subject to powerful forces of internal division and put under severe strain by western Europeans in the later Middle Ages. The book explains in detail the alternating periods of success and failure in the long history of this polity. It foregrounds the dynamics of Christian identity, asking why it tended to fracture along lines of doctrine, practice, and ultimately over Union with the Catholic West"--