In which Hesiod poem is the fullest surviving version of the Pandora myth found?

The fullest surviving version of the Pandora myth is found in Hesiod's Works and Days.

Works and Days is a Greek poem about justice, work, farming, family conduct, and the difficult conditions of human life. Within that practical and moral framework, Hesiod explains how Zeus arranged Pandora's creation after Prometheus gave fire to humanity. The poem includes the opening of the storage jar and the survival of hope.

Hesiod's Theogony also mentions Pandora, but its treatment is shorter. Theogony primarily describes the origins and genealogies of the gods, whereas Works and Days uses Pandora to explain why humans must labor and endure hardship. This difference in purpose accounts for the more developed narrative in Works and Days.

The poem is not a modern novel-like narrative. It mixes direct advice, myth, genealogy, and moral instruction. Later writers, painters, and translators expanded the story, which is why popular versions may contain details absent from Hesiod's text.