Comments by "Jim Luebke" (@jimluebke3869) on "Fans DEMOLISH Amazons New Trailer For Lord of the Rings: The Rings of Power From Super Bowl!" video.
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Tolkien wrote this as a set of legends of England, to compare to Norse mythology. England was a fairly ethnically diverse place, having been settled by Picts, Celts, Britons, Angles, Saxons, Danes, Norwegians, and Normans, who became Scots, Welsh, Cornish, Yorkshiremen, and English.
(It's fascinating that not only were these people brought together by Tolkien's work, but English, Russians, Poles, Greeks, Turks, etc are brought together the same way.)
If you really wanted to simultaneously do diversity AND honor Tolkien's vision of a new mythology for as diverse a place as America, you'd be better off creating a totally new world, and a totally new set of legends.
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