The major Greek historian who serves as the principal source for the Punic Wars is Polybius of Megalopolis.

Who Polybius Was

Polybius was a Greek statesman and historian from Megalopolis in the Hellenistic period (around 200–118 BCE). He spent many years in Rome as a political hostage, which gave him close access to Roman elites and documents.

Why He Is the Key Source on the Punic Wars

  • His main work, Histories , is a large “universal history” of Rome’s rise, covering roughly 264–146 BCE, the exact span of the three Punic Wars.
  • For the Punic Wars, Histories is the only continuous, relatively detailed Greek narrative that survives, so modern scholars regard Polybius as by far the most important written source for these conflicts.
  • He explicitly aimed at accuracy, used treaty texts and earlier Greek and Roman histories, and sometimes interviewed participants, which further boosts his value for reconstructing events.

Other Ancient Authors in the Background

Other writers do discuss the Punic Wars (e.g., the Roman historian Livy, and Greek or Greek-writing authors such as Diodorus Siculus and Appian), but they are either later, fragmentary, or less detailed, and often depend indirectly on Polybius. That is why, when someone asks which Greek historian is the major source for the Punic Wars, the answer is Polybius.

TL;DR: The key Greek historian for the Punic Wars is Polybius, whose Histories provide the primary surviving narrative of Rome’s wars with Carthage.