The historian Polybius (ca. 200--118 BCE) was born into a leading family of Megalopolis in the Peloponnese and served the Achaean League in arms and diplomacy for many years, favoring alliance with Rome. From 168 to 151 he was held hostage in Rome, where he became a friend of Lucius Aemilius Paulus and his two sons, especially Scipio Aemilianus, whose campaigns, including the destruction of Carthage, he later attended. Late in his life, as a trusted mediator between Greece and the Romans, he helped in the discussions that preceded the final war with Carthage, and after 146 was entrusted by...