You made your great mistake when you abandoned the poetry business, and set up shop as a wizard in general practice. You wrote, in your day, some very good verse, and I had the pleasure, along with other literary buzzards, of calling attention to it at the time. But when you fell into the hands of those London logrollers, and began to wander through pink fogs with them, all your native common sense oozed out of you, and you set up a caterwauling for all sorts of brummagem Utopias, at first in the aesthetic region only but later in the regions of political and aesthetic baloney. Thus a competent poet was spoiled to make a tinhorn politician.
-- H. L. Mencken, letter to Ezra Pound, Nov. 28, 1936
That is as good a description as any of artists--and academics--who get the idea that their eminence in their own specialities translates into political perspicacity. You can name a half-dozen such immediately, the same as I can. Maybe the same half-dozen.