Alduous Huxley sent George Orwell a fan-letter in Oct 1949, after receiving a review copy of Nineteen Eighty-Four from Orwell's publisher. Huxley (who, according to Letters of Note, was once Orwell's French teacher) is effusive in his praise, and goes on to directly compare Orwell's masterpiece with his own Brave New World.
Partly because of the prevailing materialism and partly because of prevailing respectability, nineteenth-century philosophers and men of science were not willing to investigate the odder facts of psychology for practical men, such as politicians, soldiers and policemen, to apply in the field of government. Thanks to the voluntary ignorance of our fathers, the advent of the ultimate revolution was delayed for five or six generations. Another lucky accident was Freud's inability to hypnotize successfully and his consequent disparagement of hypnotism. This delayed the general application of hypnotism to psychiatry for at least forty years. But now psycho-analysis is being combined with hypnosis; and hypnosis has been made easy and indefinitely extensible through the use of barbiturates, which induce a hypnoid and suggestible state in even the most recalcitrant subjects.
Within the next generation I believe that the world's rulers will discover that infant conditioning and narco-hypnosis are more efficient, as instruments of government, than clubs and prisons, and that the lust for power can be just as completely satisfied by suggesting people into loving their servitude as by flogging and kicking them into obedience. In other words, I feel that the nightmare of Nineteen Eighty-Four is destined to modulate into the nightmare of a world having more resemblance to that which I imagined in Brave New World. The change will be brought about as a result of a felt need for increased efficiency. Meanwhile, of course, there may be a large scale biological and atomic war — in which case we shall have nightmares of other and scarcely imaginable kinds.
1984 v. Brave New World