Fundamentally in example sentence
But look, if I've learned anything from studying the long history of religious tolerance in the 17th century, it's this: if you're talking about civility as a way to avoid an argument, to isolate yourself in the more agreeable company of the like-minded who already agree with you, if you find yourself never actually speaking to anyone who really, truly, fundamentally disagrees with you, well, you're doing civility wrong.