Book excerpt: The vast empire that Alexander the Great left at his death in 323 BC has few parallels. For the next three hundred years the Greeks controlled a complex of monarchies and city-states that stretched from the Adriatic Sea to India. F. W. Walbank's lucid and authoritative history of that Hellenistic world examines political events, describes the different social systems and mores of the people under Greek rule, traces important developments in literature and science, and discusses the new religious movements.