How would you order the Civ 5 civilizations in their historical importance order?

[Plotinus]

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[Domen]

Harald III was a civilization. Anything with so many nomismata has to be.

Harald III was King of Norway - not of the Vikings. Viking was a profession, not a nation. Vikings were supranational and transnational.

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[Kyriakos]

Sure. Who exactly claimed otherwise is less obvious, though