Orwell wrote plenty of non-fiction on the subject of censorship, as well. This was supposed to be a preface to the "Animal Farm", but I think it makes excellent reading on its own, and its generic points are even more salient today than they were back when it was written:
https://www.orwellfoundation.com/the-orwell-foundation/orwel...
"If publishers and editors exert themselves to keep certain topics out of print, it is not because they are frightened of prosecution but because they are frightened of public opinion. In this country intellectual cowardice is the worst enemy a writer or journalist has to face, and that fact does not seem to me to have had the discussion it deserves."
"At any given moment there is an orthodoxy, a body of ideas which it is assumed that all right-thinking people will accept without question. It is not exactly forbidden to say this, that or the other, but it is ‘not done’ to say it, just as in mid-Victorian times it was ‘not done’ to mention trousers in the presence of a lady. Anyone who challenges the prevailing orthodoxy finds himself silenced with surprising effectiveness. A genuinely unfashionable opinion is almost never given a fair hearing, either in the popular press or in the highbrow periodicals. ... Both publicly and privately you were warned that it was ‘not done’. What you said might possibly be true, but it was ‘inopportune’ and played into the hands of this or that reactionary interest."
"... there is now a widespread tendency to argue that one can only defend democracy by totalitarian methods. If one loves democracy, the argument runs, one must crush its enemies by no matter what means. And who are its enemies? It always appears that they are not only those who attack it openly and consciously, but those who ‘objectively’ endanger it by spreading mistaken doctrines. In other words, defending democracy involves destroying all independence of thought."
"These people don’t see that if you encourage totalitarian methods, the time may come when they will be used against you instead of for you. Make a habit of imprisoning Fascists without trial, and perhaps the process won’t stop at Fascists."
(Ironically, the preface itself was soft-censored in the original publication of "Animal Farm", and it took 25 more years for it to see print.)