"Man’s mind is his basic means of survival — and of self-protection. Reason is the most selfish human faculty: it has to be used in and by a man’s own mind, and its product — truth — makes him inflexible, intransigent, impervious to the power of any pack or any ruler. Deprived of the ability to reason, man becomes a docile, pliant, impotent chunk of clay, to be shaped into any subhuman form and used for any purpose by anyone who wants to bother.

There has never been a philosophy, a theory or a doctrine that attacked (or “limited”) reason, which did not also preach submission to the power of some authority. Philosophically, most men do not understand the issue to this day; but psycho-epistemologically, they have sensed it since prehistoric times. Observe the nature of mankind’s earliest legends — such as the fall of Lucifer, “the light-bearer,” for the sin of defying authority; or the story of Prometheus, who taught men the practical arts of survival. Power-seekers have always known that if men are to be made submissive, the obstacle is not their feelings, their wishes or their “instincts,” but their minds; if men are to be ruled, then the enemy is reason."

Ayn Rand, Return of the Primitive: The Anti-Industrial Revolution, 84