J.R.R. Tolkien called a fictional catastrophe that brings sudden joy or deliverance a eucatastrophe.
Tolkien introduced the term in his 1947 essay “On Fairy-Stories.” He formed it from Greek roots meaning “good” and “disaster,” presenting it as the sudden turn in a story that produces a joyful outcome after mounting danger and despair.
For Tolkien, eucatastrophe was not simply a convenient happy ending. He considered it an essential feature of fairy-story, provided that the turning point arises from the story’s events rather than from an arbitrary interruption. The experience should produce a sense of emotional release and wonder.
Tolkien associated the idea with Christian theology, describing the Resurrection as the greatest eucatastrophe in the Christian story. In The Lord of the Rings, several moments have a eucatastrophic quality, including the unexpected arrival of the Rohirrim at the Battle of the Pelennor Fields and the final destruction of the Ring.