After British journalist Malcolm Muggeridge reported from the Ukraine on the massive deaths from starvation there, he was ostracized after returning to England and unable to find a job.
More than half a century later, when the archives of the Soviet Union were finally opened up under Mikhail Gorbachev, it turned out that about six million people had died in that famine-- about the same number as the people killed in Hitler's Holocaust.
In the 1930s, it was the intellectuals who pooh-poohed the dangers from the rise of Hitler and urged Western disarmament.
It would be no feat to fill a big book with all the things on which intellectuals were grossly mistaken, just in the 20th century-- far more so than ordinary people.
History fully vindicates the late William F. Buckley's view that he would rather be ruled by people represented by the first 100 names in the Boston phone book than by the faculty of Harvard.
How have intellectuals managed to be so wrong, so often? By thinking that because they are knowledgeable-- or even expert-- within some narrow band out of the vast spectrum of human concerns, that makes them wise guides to the masses and to the rulers of the nation.
But the ignorance of Ph.D.s is still ignorance and high-IQ groupthink is still groupthink, which is the antithesis of real thinking.