Personally, one part of the process I enjoyed was describing the world of D&D in its own terms, rather than referring to real-world history and mythology.
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In 2nd Ed, the rules referred to history and to historical legends to describe the game... But by the time we were working on 3rd Ed, D&D had had such a big impact on fantasy that we basically used D&D as its own source.
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Descriptions of weapons in 2E referred to historical precedents, such as whether a weapon was use in the European Renaissance or in Egypt... We dropped the historical references, such as the Lucerne hammer, and gave dwarves the dwarven warax. And if the dwarven warax isn’t cool enough, how would you like a double sword or maybe a spiked chain?
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We were fortunate that by 2000 D&D had such a strong legacy that it could stand on its own without reference to Earth history or mythology.