In the second half of the tenth century, Byzantium embarked on a series of spectacular conquests. By the early eleventh century, the empire was the most powerful state in the Mediterranean. Yet this imperial project came to a crashing collapse fifty years later, when political disunity, fiscal mismanagement, and defeat at the hands of the Seljuks and the Normans brought an end to Byzantine hegemony. By 1081, Byzantium's very existence was threatened. How did this transformation happen? Based on a close examination of the relevant sources, this history offers a new reconstruction of the key events and crucial reigns as well as a different model for understanding imperial politics and wars. In addition to providing a narrative of this critical period of Byzantine history, Streams of Gold, Rivers of Blood offers new interpretations of topics relevant to the medieval era. The narrative unfolds in three parts: the first covers the years 955-1025, a period of imperial conquest and consolidation of authority under the great emperor Basil "the Bulgar-Slayer." The second (1025-1059) examines the dispersal of centralized authority in Constantinople and the emergence of new foreign enemies. The last section chronicles the collapse of the empire, concluding with a look at the First Crusade and its consequences for Byzantine relations with the powers of Western Europe.