In an essay “Freedom of the Press” George Orwell wrote presciently about the dangers of a press too bound to prevailing orthodoxy to print anything else:
“Unpopular ideas can be silenced, and inconvenient facts kept dark, without the need for any official ban. Anyone who has lived long in a foreign country will know of instances of sensational items of news — things which on their own merits would get the big headlines — being kept right out of the British press, not because the Government intervened but because of a general tacit agreement that “it wouldn’t do” to mention that particular fact. So far as the daily newspapers go, this is easy to understand. The British press is extremely centralized, and most of it is owned by wealthy men who have every motive to be dishonest on certain important topics.
But the same kind of veiled censorship also operates in books and periodicals, as well as in plays, films and radio. 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.