What term did J.R.R. Tolkien coin for the sudden joyous turn in a story’s fortunes?

J.R.R. Tolkien coined the term “eucatastrophe” for the sudden joyous turn in a story’s fortunes.

Tolkien introduced the concept in his 1947 essay “On Fairy-Stories,” where he described it as the opposite of catastrophe: a dramatic movement from imminent disaster to unexpected joy. The word combines the Greek prefix “eu-,” meaning “good,” with “catastrophe,” meaning a sudden reversal or disastrous outcome.

For Tolkien, eucatastrophe was more than a convenient plot device. He regarded it as the defining emotional power of the fairy-story, because it gives readers a sudden glimpse of joy beyond the ordinary limits of the story. He connected this idea with the Christian understanding of the Resurrection, which he called the greatest eucatastrophe.

The term is often confused with a routine happy ending. Tolkien’s meaning is narrower: the reversal must arrive unexpectedly, after genuine danger or apparent defeat. In The Lord of the Rings, the destruction of the Ring and the unexpected survival of Frodo illustrate related ideas, though Tolkien’s essay—not a single novel—provides the term’s formal definition.