When Rome defeated the forces of Antony and Cleopatra and annexed Egypt, the rule of the longest-lived of the Hellenistic dynasties and one of the most illustrious in Egyptian history came to an end. For nearly three hundred years, the Macedonian dynasty known as the Ptolemaic had controlled Egypt and its mixed population of Egyptians, Greeks, Macedonians, and Jews. The founder of this dynasty, Ptolemy I (367-283/2 BC), was a boyhood friend and eventually...