Time travel stories are flux capacitor fix-it fic. For example, Quantum Leap (both versions) is dedicated to the idea of making individual lives better. The best Star Trek movie (OH LIKE YOU DISAGREE) is entirely about reversing a genocide humanity slept on. Even Skynet, bless its servers, used time travel to rewrite its own story, turning the Terminator saga into the second most violent wiki-editor conflict to date.
The Lazarus Project
Interstitials: Atlas Obscura
Playout: The Scenery of Seasons by Bilibili