The multiverse has become an essential part of pop culture. The Marvel Cinematic Universe (MCU) brought this shared universe style of storytelling to global prominence with Iron Man (2008), where a post-credit scene hinted at a larger interconnected universe.
Over time, this expanded into a cinematic multiverse, particularly with the 2016 film Doctor Strange. Films like Spider-Man: No Way Home (2021) and Doctor Strange: Multiverse of Madness (2022) introduced audiences to parallel universes where different versions of the same character coexist. The multiverse has also been embraced by other films, like Everything Everywhere All At Once (2022), which won multiple Academy Awards and Stree 2, which became the highest-grossing Bollywood film of all time in September 2024.
This style of storytelling has deep literary roots. I believe the first person to master the fictional multiverse was the 19th-century French novelist, Honoré de Balzac, in his monumental work La Comédie Humaine (The Human Comedy, 1829-1847).