In J.R.R. Tolkien’s The Lord of the Rings, Gollum destroys the One Ring.
Frodo Baggins carries the Ring to Mount Doom, but at the Crack of Doom he claims it instead of willingly giving it up. Gollum attacks Frodo, bites off his finger, and falls into the volcanic fire while clutching the Ring. The destruction ends Sauron’s power and causes the Dark Lord’s defeat.
Frodo and Samwise Gamgee are therefore central to the Ring’s journey, but neither directly destroys it. Frodo’s decision to spare Gollum earlier in the story proves decisive, because Gollum’s later actions unintentionally complete the quest.
This event is sometimes summarized as Frodo destroying the Ring because he brings it to Mount Doom. The precise answer in the narrative is Gollum. Tolkien also presents the outcome as dependent on mercy, chance, and the long moral consequences of Bilbo and Frodo choosing not to kill Gollum when they had the opportunity.