In the two preceding chapters I have described the techniques of what may be called wholesale mind-ma­nipulation, as practiced by the greatest demagogue and the most successful salesmen in recorded history. But no human problem can be solved by wholesale methods alone. The shotgun has its place, but so has the hypo­dermic syringe. In the chapters that follow I shall describe some of the more effective techniques for ma­nipulating not crowds, not entire publics, but isolated individuals.

In the course of his epoch-making experiments on the conditioned reflex, Ivan Pavlov observed that, when subjected to prolonged physical or psychic stress, laboratory animals exhibit all the symptoms of a nervous breakdown. Refusing to cope any longer with the intolerable situation, their brains go on strike, so to speak, and either stop working altogether (the dog loses consciousness), or else resort to slow­downs and sabotage (the dog behaves unrealistically, or develops the kind of physical symptoms which, in a human being, we would call hysterical). Some animals are more resistant to stress than others. Dogs possess­ing what Pavlov called a "strong excitatory" constitution break down much more quickly than dogs of a merely "lively" (as opposed to a choleric or agitated) temperament. Similarly "weak inhibitory" dogs reach the end of their tether much sooner than do "calm imperturbable" dogs. But even the most stoical dog is unable to resist indefinitely. If the stress to which he is subjected is sufficiently intense or sufficiently pro­longed, he will end by breaking down as abjectly and as completely as the weakest of his kind.

Pavlov's findings were confirmed in the most dis­tressing manner, and on a very large scale, during the two World Wars. As the result of a single catastrophic experience, or of a succession of terrors less appalling but frequently repeated, soldiers develop a number of disabling psychophysical symptoms. Temporary unconsciousness, extreme agitation, lethargy, functional blindness or paralysis, completely unrealistic responses to the challenge of events, strange reversals of lifelong patterns of behavior — all the symptoms, which Pavlov observed in his dogs, reappeared among the victims of what in the First World War was called "shell shock," in the Second, "battle fatigue." Every man, like every dog, has his own individual limit of endurance. Most men reach their limit after about thirty days of more or less continuous stress under the conditions of mod­ern combat. The more than averagely susceptible suc­cumb in only fifteen days. The more than averagely tough can resist for forty-five or even fifty days. Strong or weak, in the long run all of them break down. All, that is to say, of those who are initially sane. For, ironically enough, the only people who can hold up indefinitely under the stress of modern war are psychotics. Individual insanity is immune to the consequences of collective insanity.

The fact that every individual has his breaking point has been known and, in a crude unscientific way, exploited from time immemorial. In some cases man's dreadful inhumanity to man has been inspired by the love of cruelty for its own horrible and fascinating sake. More often, however, pure sadism was tempered by utilitarianism, theology or reasons of state. Physi­cal torture and other forms of stress were inflicted by lawyers in order to loosen the tongues of reluctant witnesses; by clergymen in order to punish the unor­thodox and induce them to change their opinions; by the secret police to extract confessions from persons suspected of being hostile to the government. Under Hitler, torture, followed by mass extermination, was used on those biological heretics, the Jews. For a young Nazi, a tour of duty in the Extermination Camps was (in Himmler's words) "the best indoctrina­tion on inferior beings and the subhuman races." Given the obsessional quality of the anti-Semitism which Hitler had picked up as a young man in the slums of Vienna, this revival of the methods employed by the Holy Office against heretics and witches was inevitable. But in the light of the findings of Pavlov and of the knowledge gained by psychiatrists in the treatment of war neuroses, it seems a hideous and grotesque anachronism. Stresses amply sufficient to cause a complete cerebral breakdown can be induced by methods which, though hatefully inhuman, fall short of physical torture.

Whatever may have happened in earlier years, it seems fairly certain that torture is not extensively used by the Communist police today. They draw their inspiration, not from the Inquisitor or the SS man, but from the physiologist and his methodically condi­tioned laboratory animals. For the dictator and his policemen, Pavlov's findings have important practical implications. If the central nervous system of dogs can be broken down, so can the central nervous system of political prisoners. It is simply a matter of applying the right amount of stress for the right length of time. At the end of the treatment, the prisoner will be in a state of neurosis or hysteria, and will be ready to confess whatever his captors want him to confess.

But confession is not enough. A hopeless neurotic is no use to anyone. What the intelligent and practical dictator needs is not a patient to be institutionalized, or a victim to be shot, but a convert who will work for the Cause. Turning once again to Pavlov, he learns that, on their way to the point of final breakdown, dogs become more than normally suggestible. New be­havior patterns can easily be installed while the dog is at or near the limit of its cerebral endurance, and these new behavior patterns seem to be ineradicable. The animal in which they have been implanted cannot be deconditioned; that which it has learned under stress will remain an integral part of its make-up.

Psychological stresses can be produced in many ways. Dogs become disturbed when stimuli are unu­sually strong; when the interval between a stimulus and the customary response is unduly prolonged and the animal is left in a state of suspense; when the brain is confused by stimuli that run counter to what the dog has learned to expect; when stimuli make no sense within the victim's established frame of ref­erence. Furthermore, it has been found that the de­liberate induction of fear, rage or anxiety markedly heightens the dog's suggestibility. If these emotions are kept at a high pitch of intensity for a long enough time, the brain goes "on strike." When this happens, new behavior patterns may be installed with the great­est of ease.

Among the physical stresses that increase a dog's suggestibility are fatigue, wounds and every form of sickness.

For the would-be dictator these findings possess important practical implications. They prove, for example, that Hitler was quite right in maintaining that mass meetings at night were more effective than mass meetings in the daytime. During the day, he wrote, "man's will power revolts with highest energy against any attempt at being forced under another's will and another's opinion. In the evening, however, they succumb more easily to the dominating force of a stronger will."

Pavlov would have agreed with him; fatigue in­creases suggestibility. (That is why, among other rea­sons, the commercial sponsors of television programs prefer the evening hours and are ready to back their preference with hard cash.)

Illness is even more effective than fatigue as an intensifier of suggestibility. In the past, sickrooms were the scene of countless religious conversions. The scientifically trained dictator of the future will have all the hospitals in his dominions wired for sound and equipped with pillow speakers. Canned persuasion will be on the air twenty-four hours a day, and the more important patients will be visited by political soul-savers and mind-changers just as, in the past, their ancestors were visited by priests, nuns and pious lay­men.