What "Pandora's box" actually means

A term you'll meet in Greek mythology (Hesiod's Works and Days).

Pandora's box describes a seemingly small or contained action that unleashes a chain of irreversible, escalating trouble. The phrase is one of the most common mythological idioms in English — and it's built on a translation error that's now five centuries old.

The original myth

The earliest surviving version comes from the Greek poet Hesiod, writing around 700 BCE in Works and Days. Zeus, angry at Prometheus for stealing fire and giving it to humanity (see our entry on Promethean), orders the creation of Pandora — in Hesiod's account, the first woman — as a punishment aimed at mankind. She is given a sealed container holding every evil that can afflict human life: disease, old age, toil, war, and the rest. She opens it, and the evils escape into the world, never to be recaptured.

Why it was never a "box"

Hesiod's Greek word for the container is pithos — a large, sturdy storage jar, the kind used in antiquity to hold wine, oil, or grain, not a small hinged box. The mix-up dates to the early 16th century, when the Dutch humanist Erasmus translated the story into Latin and rendered pithos as pyxis — Latin for a small box. The mistranslation stuck through every retelling that followed Erasmus into English, and "Pandora's box" has been the standard phrase ever since, even though it gets the container wrong.

The detail everyone forgets: hope

The most overlooked part of the myth is what happens at the very end: as the evils escape, Pandora manages to close the jar before one last thing gets out — Elpis, usually translated as "Hope." Ancient and modern readers have long disagreed about what this means. One reading: Hope alone remains available to humanity, trapped inside but still reachable when needed — a small mercy. The opposite reading, which some classicists find textually stronger: Hope is trapped inside with the evils, permanently withheld from a humanity that now has to face every other misery without it. Hesiod doesn't settle the question, and the ambiguity has outlived him.

The idiom today

"To open Pandora's box" now means to take an action, often one that looks minor or reversible, that turns out to release consequences far larger than anyone anticipated and impossible to undo. The phrase has comfortably survived getting its central object wrong for five hundred years, which is its own small irony: a story about an unstoppable, escalating mistake, told and retold through an unstoppable, escalating mistake of translation.

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