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I think this should be a subpage on main show pages rather than listing examples on here. It could be a good way to explain a complex fictional world or species.
Why does this page have a list of examples? Every single fictional world would have to be on that list, as well as everything with an alternate history and a lot of other works as well.
A page to explain the term is okay, but the list of examples is pointless.
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How well does it match the trope?