"A man with a definite belief always appears bizarre, because he does not change with the world; he has climbed into a fixed star and the earth whizzes below him like a zoetrope. Millions of mild-mannered men call themselves sane and sensible merely because they always catch the fashionable insanity, because they are hurried into madness after madness by the maelstrom of the world." ~ G.K. Chesterton
Much of what passes today as "the authoritative final word" on a whole host of subjects including science, politics, economics, and, especially, historiography is, in the words of Chesterton, "fashionable insanity."
Hat tip to George Grant.