A lover of trout-fishing has been writing lately upon the question as to

whether the trout in much-fished rivers and lakes do or do not exhibit

increased “wariness,” or even “intelligent caution” in avoiding the

flies so cunningly thrown before or above them by the skilful angler. It

is argued that there cannot really be any increased indisposition of

trout to take the fly based on experience, because on an estimate of the

number of trout in a river like the Test, and of the limited number of

anglers, every fisherman would have to hook and lose some thousands of

fish every year for the experience to be general among trout that the

horrid artificial flies “hide a still more horrid hook.” It is, of

course, held that the trout cannot communicate their experiences to one

another by any form of conversation (though leadership and imitative

habit might have some effect), and it is also not suggested that a trout

which had acquired an overpowering aversion to the angler’s fly as a

result of being hooked and breaking free, could transmit that aversion

to its offspring by the mere fact of reproduction. Hence it is

maintained that there is no such increasing “wariness” in English and

Scotch trout. It is a curious thing that in discussing this matter the

fundamental principle should have been overlooked by which Darwin and

Wallace have long ago explained to the satisfaction of naturalists, the

aversions and cautious proceedings of all kinds of animals, from the

smallest insects up to birds, beasts, and fishes. The principle of

natural selection and survival of the fittest accounts for the increased

caution of trout in well-fished rivers in the simplest way. Assume (as

is perfectly reasonable) that some trout are more shy than others “by

nature,” that is to say, are born so, that some are born with a slightly

more rapid response to the sight of food than others—as one sees often

enough with a lot of the young of any animal—then the increased shyness

or pretended “intelligence” of the trout after many years’ fishing

follows as a necessity. The rash fish are caught and destroyed, the shy

fish remain in the river, and—here is the important point, a

well-ascertained fundamental law of heredity—propagate their like. They

produce shy fish. Every year this selection goes on till you get a race

of fish in the well-fished river which are so shy that they cease to

rise at all! This unpleasant result is avoided by the proprietors of

trout streams to a certain extent by introducing a race of trout which

has not in consequence of over-fishing developed an innate shyness of

character (such as the Loch Leven and some others) to mix and breed with

the timid over-fished race.

It is in the same way that the human population of country villages,

most sad to see, is every year rendered less intelligent than it was a

hundred years ago. All the enterprising, intelligent young men and

maidens are “fished” away, drawn by baits and hooks to the great towns;

only the dull and relatively incapable are left in the village to marry

and produce a new generation. The village population necessarily becomes

made up of a dull stock—incapable, as appears from official reports, of

being educated beyond a very low stage. In some districts 70 per cent.

of the children are thus unintelligent, though not unhealthy or

imbecile. It is possible that the want of home-training and example in

very early childhood is to some extent a cause of the dullness of

village children. And so it goes on, generation after generation, as

facilities for leaving the village increase and inducements to stay or

return decrease. The 30 per cent. of the new generation who have any

“wits” leave the village, never to return. And no one re-stocks the

village. That must be taken in hand soon.

XXIX

THE FEEBLE-MINDED

A considerable proportion of the young which are produced as a new

generation of either plants or animals are not merely unlike their

parents in some small particulars of colour, proportion, activity, and

so on, but are, as compared with the normal or usual standard of the

species, “defective”; that is to say, they are wanting in some organ or

part, as though maimed, or by some cause restricted or reduced in regard

to that part. This occurs in human beings, and in domesticated animals

more obviously than in wild animals and plants, for two reasons:

firstly, because in wild conditions the defective young die off very

early in the struggle for existence and so escape human observation;

whereas man protects his own “defective” young, and often, also, those

of domesticated animals, so that they are allowed to “grow up” more or

less; secondly, such defective structure appearing at birth, and

therefore called “congenital,” is carried on by heredity, more or less

completely, should the defective animal or plant be allowed to breed.

Such breeding of defective individuals is prevented in wild nature by

their early destruction; their defects cause their early death by

unfitting them for the competition and struggle which are in natural

conditions rigidly severe. Only a few survive among the many thousands

of each species born into conditions of limited food and

space—conditions which are not sufficient to support more than a very

small number so as to enable them to reach the adult or breeding stage

of life. But man, on the contrary, protects his own young, and often

those of his domesticated animals and plants, from this destructive

competition, and thus allows those which are to a certain extent

defective to breed.

The official returns of the Registrar-General record every year a

proportion of deaths of infants which are entered as due to “congenital

defects.” These defects are of many and various kinds. A frequent

“congenital defect” is one which does not necessarily cause death,

namely, the imperfection of the wonderfully elaborate organ of sight,

rendering it useless. Children often are born blind, and so are a

certain proportion of each species of animal normally provided with

eyes—dogs, horses, cattle, birds, fish. Even insects, lobsters, and

crabs are in quite considerable and definite number born blind. The

inborn or congenital defects of the eyes which result in blindness are

of several kinds. The whole of the eyeball or eye-structure may be

atrophied, that is to say, dwindled and incomplete, or one essential

part only may be defective, and the rest quite well-formed; or, again,

the nerves connecting the eye with the brain or the several parts of the

brain concerned in the function of sight may, one or more of them, be

defective. Wild animals born in this condition must perish, except when

they happen to be born in caverns or in the deep sea. Then they are no

worse off than animals with “good” eyes. But the animals with good eyes,

or even with only somewhat defective eyes, will follow up the gleams of

light which in moving about they have the fortune to encounter, and so

will escape from the cavern or dark depths of the sea, leaving behind in

the dark only those with defective eyes. These will breed together, and

perpetuate their defective eyes in a more and more marked degree in

successive generations. Always those which can see, or see only a

little, will leave the dark place, and so at last there will be a race

of animals established in such places with defective eyes (as in the

ocean, at a depth of two thousand fathoms, and in the great caves of

Europe, and notably in the Mammoth Cave of Kentucky, U.S.A.), and often

the eyes will altogether disappear. This, however, is a digression.

The cause of congenital defect in eyes is not obvious. The failure of

the germinal substance of the reproductive egg or particle detached from

parents with sound eyes, to unfold itself—to develop—into a creature

with sound eyes like those of its parents, is apparently due, in some

instances, to one cause, and in other instances to other causes, of none

of which can it be said that we have a satisfactory and comprehensive

knowledge. The same want of full knowledge exists in regard to the

causation of other congenital defects. These are as numerous and varied

as the parts of the body which may be from birth onwards, in one

instance or another, distorted, devoid of some essential inner

structure, swollen to great size, or shrunken, or even absent

altogether. Such defects are sometimes caused by mechanical pressure or

nipping in early stages of growth before birth, but there are many which

cannot be accounted for in that way. The wonder really is not that the

inconceivably complex structure of higher animals should sometimes fail,

in this or that part, to develop in due course from the simple-looking

germ, destitute of visible structure, but that it should, on the

contrary, so regularly and completely come off successfully in millions

of instances every day. We can imagine or suggest disturbing agencies

which may be the causes of failure, but it is very difficult to

demonstrate with certainty the causes which have been at work in each

and every case.

One result of failure of the germ to “grow up” into the perfect likeness

of its parents is that it may “throw back,” as the breeders say, and

resemble in this or that quality a remote, even an extremely remote,

ancestor. It is suggested by some inquirers that the congenital or

inborn defect, frequent in human beings, which is called

“feeble-mindedness” is a reversion or throw-back to the condition of the

brain in the animal ancestors of man. That is possible, and, in view of

some cases, seems probable. But it must be noted that we do not know

what are the causes which favour throwing-back, or “atavism,” as it is

called, in regard to all sorts of structures, and that the mechanical

conditions connected with the growth of the cavity of the skull in which

the brain itself grows are so very elaborate that it is obvious that a

very slight disturbance of one element or another might arrest or turn

aside the growth of that vastly complex organ, which has become so much

larger and more delicate in man than in the animals from which he has,

at no remote period in the history of life on the earth, taken his

origin.

Mankind have always within the period of written records (a mere trifle

in the lapse of time since man became man) regarded mental defect and

aberration as due to fantastic causes. To this day we use the word

“lunatic” for one of the two typical forms of mental aberration: we

imply that the moon is concerned in its production. The other form of

brain-failure has appropriated the term “idiot,” which, it is surprising

to find, was less than two centuries ago applied in common speech to any

person who was characterised by independence of judgment. The term

“softy” is a common and really more suitable term for this class, whilst

“cracked” is the word applied to a lunatic. The notion that mental

aberration is due to “possession” by evil spirits, which can be expelled

and the patient accordingly cured, was prevalent a century ago, and the

belief is common at the present day (though quite erroneous) that people

“go mad” in virtue of some immaterial and unaccountable influence, and

may therefore “go sane” again. The lunacy laws and the laws relating to

the care of the feeble-minded in this country are admitted to be tainted

with ignorance and misconception, and both are in process of correction

by the Government of the day.

The approved professional terms used in distinguishing the varieties of

“the mind diseased” are not accepted with much favour by the public, and

it is unnecessary to introduce them here. The important fact is that

persons of diseased mind may be separated into two groups—(_a_) the

idiots or softies, and (_b_) the lunatics or cracked people. The idiotic

group are those with a defective amount or quality of brain substance

(whether the skull itself is small or abnormally distended by “water on

the brain”), and are more or less incapable of being educated. They are

often subject to epileptic fits, and are usually weakly in build, though

they sometimes have great muscular strength. The “feeble-minded,” of

whom so much has lately been written, owing to the recent report of a

Government Commission, belong to this group. They are distinguished from

the more marked section of idiots in that they are not absolutely devoid

of some intelligence, and are capable, under proper supervision, of some

degree of self-control. Some of them even can take part in industrial

operations, though they require constant direction when so employed, and

are never, even in the least serious cases, susceptible of mental

development beyond a strangely and abruptly limited degree. Contrasted

with the idiots are the lunatics; they often are gifted with the highest

receptivity, and frequently are men or women of the highest education

and intellect, normal in every feature of body and mind except that

their mental machinery works in a defective, “mad” way as to one or more

subjects—often only as to one subject or class of subjects. They

exhibit in different individuals a vast variety of illusions and

propensities which may be merely unreasonable or may be dangerous to

themselves and to others.

It seems that the idiotic and feeble-minded are devoid of, or defective

in, general mental receptivity, although in regard to a few things they

may have retentive but unintelligent memory. Even the less afflicted

among them are incapable of “thinking” at all, because their defective

memory or receptivity gives them nothing to think about. On the other

hand, the lunatic exhibits the ordinary receptivity of a healthy human

being, but thinks wrongly or absurdly upon one or a few lines, though

normally and soundly upon every other.

The State in civilised countries has long since made provision for the

proper medical care and restraint of lunatics and of the extreme cases

of the other class, the idiots. But by an oversight in this country,

which the gravedigger in _Hamlet_ would consider very natural, the less

extreme cases of idiocy—the so-called feeble-minded—have been left

without State guardianship. It is a fact that these cases occur both in

the wealthiest and the poorest class of the community, though they are

put away under medical care by well-to-do families, and are left by the

very poor to wander about and get into terrible mischief. Hence there

has grown up a belief that feeble-minded offspring are more frequently

produced by mentally sound parents who are very poor than by those who

are rich or well-to-do, though there are not facts or figures which

establish that conclusion. It has further been maintained that this

supposed large proportional rate of production of feeble-minded among

the poorest, ill-fed, ill-housed, and vicious dregs of the community is

due to the action of defective nutrition, alcoholism, and lack of fresh

air and healthy occupation upon the parents, and that a deterioration of

the reproductive material, a twist, as it were, of the inner substance

of the stock or breed in the direction of feeble-mindedness, has been

thus established.

In reply to this somewhat hasty but at first sight plausible conclusion,

we maintain (1) that the definite defect called feeble-mindedness is as

common in well-nourished, well-to-do families as in the poorest; (2)

that it is not proved that lack of food and good air can act upon the

germs contained in a parental animal, so as to alter it in such a way

that the brain of offspring begotten by that parent will not develop in

normal structure and proportion; and, moreover, that “it has not been

shown” (that is the important clause of the statement) that defective

food and air can so alter the germs in a parent as to cause other

deformation or structural defect in the young which grow from those

germs. It is, on the other hand, true that such defect of food and air

may cause the death of the parent, or may directly cause the death of

the young, if the young are subjected to such defective conditions of

life. It is necessary to point out, in reply to those who hold the

starvation theory, of feeble-mindedness that it is capable of being

handed on by hereditary transmission once it has appeared, and that in

the most wretched groups of the population, both in cities and in

country villages, the feeble-minded are not taken in charge by any

authority, but leave their parents and shift for themselves, and, owing

to their weakness, accompanied by unrestrained animal desires, they

become, in an irregular way and at a very early age, themselves the

parents of feeble-minded children. Thus feeble-mindedness is increased

in the poorest class, but not in that of the rich. The facts ascertained

are too horrible and painful for citation here. The recent Commission

has made it clear that it is absolutely necessary for the State to

interfere and prevent this terrible increase of helpless imbeciles.

There are eighty-four schools in London for the education of children

who are not included under the extreme terms idiots or imbeciles, but

are “feeble-minded and defective.” They are attended by 6000 children,

of whom about two-thirds learn some useful manual work, whilst the rest

are hopeless, and require permanent custodial care—which at present is

not to be had by those whose parents cannot pay for it—but will, there

is every reason to hope, soon be provided for them by the State. In its

absence they constitute a real and ghastly danger to the community,

since some of them are certain to propagate their kind, and not only

will thus add to the existing large body of imbeciles, but perpetuate

the taint of feeble-mindedness in the race.

It is an interesting question as to whether there is a definite gap—a

difference of kind between these poor, defective children and the

markedly stupid boys and girls of some village schools. I am inclined to

believe that there is. The one group does not pass by a gradual series

into the other. It has been stated that in some remote country districts

of England only one-third of the school children can be taught more than

the merest elements of writing, reading, and arithmetic; the majority

are immovably dull, only the minority are as bright as ordinary London

children. But even the dull village children get so far as to master the

elements of learning, and probably their brains are not structurally

defective, but only inactive for the time being. They may hereafter

become village Hampdens. It certainly does seem to be the fact that the

villages are continually deprived of the more intelligent members of

their population by the attractions of the big towns, and that only the

duller portion stay to breed in the village like the blind animals in a

cave. But dullness is not identical with feeble-mindedness.

It is maintained that even in towns the multiplication of the

hard-working, cautious, and capable section of the community is at a

standstill. Its members seek comfort, intellectual exercise, and

self-culture; they refuse to deprive themselves of these things, which

cost money, and to spend that money on bringing up large families. On

the other hand, the far more numerous “working-class” has no such

ambition as a rule, and no anxiety as to what is to become of its

offspring, however numerous. The more children the larger are the

earnings of the family, and all in turn shift for themselves at an early

age. The rates pay for such education as they require, and their parents

have no desire to push them up the social ladder; but food, lodging, and

clothes cost money. The working-man who desires to read, see things for

himself, and be more than an animated cog on a wheel, cannot afford to

have children and transmit to them that modicum of intelligence above

the average which distinguishes him from his fellows, and demands for

its cultivation the money with which he might keep a large family.

Consequently the population is more and more largely replenished by the

unenterprising poor and the unenterprising rich; the group which is

enterprising and capable, and directs the work and thought of the

civilised world, is, by the very qualities which make the increase of

its strain desirable, debarred from contributing its fair proportion to

the increase of the population. Is it possible for the community, by any

system or by legislation, to overcome or evade this unfortunate

tendency?

The neglect by both the local and central government to provide any

supervision of feeble-minded children has had a special result of a

strange and unhappy description. Let me hasten to say that now that we

have secured by recent legislation the vitally important medical

inspection of children in connection with Board schools, and the

registration and official inspection of feeble-minded children which

will surely be made compulsory before another year has passed, the

danger of which I am about to speak will very shortly no longer exist.

It is this. Feeble-minded children (whose condition falls short of that

of actual idiocy) are almost impossible to manage as members of an

ordinary family or household. Their condition is often not properly

recognised; their parents or guardians find them to be obstinate,

unteachable, and dirty. Often, when the family is poor, they are, under

these circumstances, “boarded out” for a very small payment, or even

taken charge of, out of charity. None of the persons concerned in these

transactions know that they are dealing with a hopelessly unteachable

child, born with this defective brain. They find scolding has no effect

in guiding the child, mild chastisement fails, and the poor ignorant

foster-parent (sometimes even the child’s own mother) becomes

exasperated and determined to subdue what seems to be mere obstinacy and

indifference. The awful demon of cruelty is let loose. What seems at

first a virtuous determination to control and regulate the child’s

behaviour for its own good leads to the infliction upon it of blows of

savage violence, then to the less dangerous but revolting attempt to

enforce obedience by the pain caused by a burn, and to starvation as a

final instrument of discipline. A very large number of the cases of

cruelty to children and adolescents which from time to time are brought

into the law courts have their origin in the fact that the victim was

“feeble-minded,” and that the guardian found guilty of cruelty did not

(any more than do the judge and jury) understand or, indeed, know

anything at all about such a condition. Often the feeble-mindedness

itself has been attributed to the cruel treatment of the child, whereas

the latter really was set going by the former. To a large extent the

community is to blame for allowing “feeble-minded” children to be

boarded out except in proper medical institutions, guaranteed and

inspected by State authority. It is the same story as that which was

once common enough in regard to “lunatics,” but has now been put an end

to by the law. The boarding-out of children, whether healthy or

weak-minded, should in all cases be illegal, except under proper

official sanction and guarantee. It is not only for the sake of the

children that this provision is necessary. It is certain that foolish

people have been led, in the absence of all restraint and interference

by public authority, to undertake without evil intention the care of

discarded children, and have been led on by the hopeless dullness and

obstinacy of a child with defective brain into cruel treatment of it;

and when in some cases the child has died as the natural consequence of

its congenital feebleness, the miserable guardians have been found

guilty of causing its death. Though little excuse can be made for such

miscreants, it is greatly to be desired that the law should step in at

an earlier period, and both ensure proper care for the feeble-minded

child and remove from unqualified guardians the chance of developing

from a state of mere ignorance into one of criminal responsibility.

Science from an Easy Chair · 第 19 / 33 段