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.George Orwell, “The Freedom of the Press“
Unfashionable opinions can be wrong; prevailing orthodoxies can be right. I don’t know what Orwell expects here, but I do know that he is correct regarding the power of ideology to silence, the need to cultivate environments that allow for the free and open exchange of ideas, and the establishment of a public discourse that encourages speech, civil disagreement, and the possibility of reasoned argument and exchange.