“
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 . . . [And] anyone who challenges the prevailing orthodoxy finds himself silenced with surprising effectiveness. A genuinely unfashionable opinion is almost never given a fair hearing, whether in the popular press or in the highbrow periodicals.
”
”