Jujutsu Kaisen has always focused on the nature of the strongest and what their existence means for the rest of the world. 1000 years ago, everyone lived subservient to Sukuna since he was the strongest and, in the modern age, Gojo was the one to covet this title. However, the landscape of the world changed after Gojo's intense battle with the King of Curses, one which ended up with the Honored One dying after a very close fight.