>Er, as I understand it, the reason to remove racial slurs from our lexicon is not because the words are bad in themselves, that the phonemes are opprobrious, but because we're attempting to eradicate the belief systems implied by those words (or at least disempower those who hold those beliefs).
This is true, but why is it just for a majority to censor belief systems out of existence. Your example is obviously extreme, but what about something like censoring a religion out of existence?
>I have not really found belief systems in history that are unspeakable today that I think would actually be cool.
Do you not think that would be a natural side effect of the people in charge of censoring things also applying their censorship powers to history?
Take communism for example. It is quite conceivable that people hating the general idea will heavily conflate the idea with the poor implementations when writing history. Then people studying it in the future will wonder why anyone in their right mind would have ever wanted anything to do with communism.
This should be getting much harder with the Internet and the easy storage of information, but it's likely to have been quite prolific throughout history. Especially when governments wanted to make sure a belief system that was a threat to its existence never rose up again.
So, the arc of history seems to have been bending towards justice because that's the way the arc of history was intended to be written.