During the Dark Ages, scholars would argue endlessly over minor points of doctrine regarding the nature of free will and of God, and the reconciliation of Aristotle with the Bible. Incidentally, they invented predicate logic and systems of proof, and honed them to a fine art. Dark Ages folks, nothing to see there, just marking time till the Renaissance and the Modern Era -- which could never have happened without that background in logic.
There are more examples, I am sure. History changes regularly, not so much in the facts as in the emphasis. The most common error people make is misattribution of importance and causality.