When Doctor S. Weir Mitchell pointed out two generations ago that not only headache, but rather serious nervous disturbance involving often the gastro-intestinal [{204}] tract and sometimes other large organs like the brain itself, as well as even mental operations, might come from so small a cause as disturbance of accommodation in the eye, most physicians refused to believe that such far-reaching symptoms could come from what was apparently so trivial a factor. The accommodation mechanism of the eye is extremely delicate, however, and requires such nice adjustment that any interference with it causes a waste of nervous energy that is likely to make itself felt at almost any part of the nervous system. In our day disturbances of the eye are confessed by all to be extremely important. In something of the same way disturbances of the sexual system of the body are reflected throughout the whole nervous system.
Religion has counseled, commanded and thundered against any practices, however simple they might seem in themselves, that would serve as excitants for the sex feelings. Without her influence even more harm would have been done than has been. It is the waning of religious power over public morality and public opinion that has led to the orgy of indulgence in sexual excitation, which has had such bad effects and which unfortunately so often leads to sexual acts which are fraught with the hideous dangers of venereal disease, because passion excited will find its satisfaction. Society heedlessly arouses passion but apparently cares not what happens afterwards.
CHAPTER XI
INSANITY
There is a very prevalent impression that religion is a common, even rather frequent cause of insanity. This is founded on popular experience. It has often been noted that not a few of the people who go insane have delusions on religious subjects. It is also a very common observation that those who are on the road to insanity and have finally to be placed in an asylum have for some time been making themselves conspicuous by their excessive practice of religious observances of one kind or another. It is not surprising then that the familiar fallacy post hoc ergo propter hoc, "after this therefore the result of this", should have come to be applied in these cases, and that religion should be set down as a prominent factor of mental disease and perhaps one of the commonest causes of the condition.
Those who have given most study to the subject, however, know very well that this conclusion is quite as unjustified by the facts of the case as the corresponding one with regard to religion being a frequent source of nervous diseases. We will discuss that in the chapter on Nervous Diseases, and almost necessarily the closely related subject of mental disturbances is touched on somewhat there. Of course it is well understood that a great many of those who are on the road to such mental alienation [{206}] as will eventually require their internment in an asylum will give many external manifestations of religious feelings, some of them exaggerated beyond reason, as perhaps the very earliest striking symptom of their mental alienation. Religion, as we said in the Introduction, is one of the most universal interests of men. When people go insane, some interest will receive exaggerated attention. The delusions of their insanity are dependent on what the deepest interest of the individual was. If he was interested in money, he will believe himself the richest or perhaps the poorest of men. If he is interested in science, his delusions will be associated with that subject. Delusions concerning some phase of science are probably even more common in our day than those based on religion. Electricity is the source of more delusions than anything else, though hypnotism and telepathy and other sensationally exploited modes of so-called psychology are a close second in this respect. If the patient has recently suffered a severe loss by the death of a friend, sorrow will be the central idea of his mental disturbance; if there has been a disappointment in love, that will be the focus of his mental troubles; if there has been a money loss, that disappointment will be the core of the depression. Almost any human interest may thus become the root of excitement or discouragement leading to mania or melancholia.
The Great War gave us some very interesting material as to mental as well as nervous disease. In nothing was that more interesting than as to the causes from which insanity develops. It might very well have been expected that a great many people would break down under the awful conditions in which they were placed during the war. For instance Poland was fought over some six times, [{207}] and portions of Austria overrun three times, and Servia was, between war and the ravages of famine and disease, a veritable shambles of its people for three or four years. It is easy to understand the awful states of anxiety and solicitude and almost continuous terror to which the inhabitants of Belgium, occupied by the Germans, were subjected, particularly in the smaller places where they were utterly at the mercy of the German officials whose one idea, fostered by their military teaching, was that the end of the war would be brought about or at least greatly hastened by a policy of frightfulness.
Literally many millions of people were subjected to conditions which would seem to be impossible for human nature to stand for any length of time, and yet they had to bear them continuously for four years or more.
The records of the development of insanity among these people have been rather carefully gathered, and they reveal the astounding fact that the insanity rate was very little higher among all these intense sufferers from the war than it would have been under the ordinary conditions of civil life. Manifestly a certain number of persons had the insanities which would have developed in them in later years anticipated by the trials and the hardships of wartime conditions, but only those suffered from insanity as a rule who might have been expected to do so because their family or personal history revealed tendencies in that direction which would almost surely have made themselves manifest sooner or later even under the inevitable vicissitudes of peace time.
What modern medicine has revealed to us is that apart from certain infectious diseases which produce degeneration of the physical basis of mind and the absorption of certain poisons—alcohol is a typical example—which [{208}] cause a corresponding degeneration to the infections, the supreme factor in insanity is the inheritance of a predisposition to the affection. Two things have become perfectly clear in the course of modern medical investigation, that insanity and longevity run in families, and that there is almost no other basis on which the two conditions may develop. Infections or intoxications in the broad sense of the word may produce conditions to foster or impair respectively either of them, but even they are of minor significance compared to the original inheritance in either case.