The One Piece series would not be as beloved or popular as it is today if it wasn't for the incredible worldbuilding that Eiichiro Oda is known for. It's a story famous for vaguely introducing concepts early on, only for them to lead to a massive payoff many years and hundreds of chapters later. Because of this, the franchise is rife with fan theories and rampant speculation around the community about almost everything that the world has to offer.
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