A classic 1967 essay by Noam Chomsky on the proper role of intellectuals:
It is the responsibility of intellectuals to speak the truth and to expose lies. This, at least, may seem enough of a truism to pass over without comment. Not so, however. For the modern intellectual, it is not at all obvious. Thus we have Martin Heidegger writing, in a pro-Hitler declaration of 1933, that “truth is the revelation of that which makes a people certain, clear, and strong in its action and knowledge”; it is only this kind of “truth” that one has a responsibility to speak. Americans tend to be more forthright. When Arthur Schlesinger was asked by The New York Times in November, 1965, to explain the contradiction between his published account of the Bay of Pigs incident and the story he had given the press at the time of the attack, he simply remarked that he had lied; and a few days later, he went on to compliment the Times for also having suppressed information on the planned invasion, in “the national interest,” as this term was defined by the group of arrogant and deluded men of whom Schlesinger gives such a flattering portrait in his recent account of the Kennedy Administration.