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Charles Darwin > The Expression Of The Emotions In Man And Animals > Chapter II

The Expression Of The Emotions In Man And Animals

Chapter II


GENERAL PRINCIPLES OF EXPRESSION--_continued_.

The Principle of Antithesis--Instances in the dog and cat--
Origin of the principle--Conventional signs--The principle
of antithesis has not arisen from opposite actions being
consciously performed under opposite impulses.


WE will now consider our second Principle, that of Antithesis. Certain states
of the mind lead, as we have seen in the last chapter, to certain
habitual movements which were primarily, or may still be, of service;
and we shall find that when a directly opposite state of mind is induced,
there is a strong and involuntary tendency to the performance of movements
of a directly opposite nature, though these have never been of any service.
A few striking instances of antithesis will be given, when we treat of
the special expressions of man; but as, in these cases, we are particularly
liable to confound conventional or artificial gestures and expressions
with those which are innate or universal, and which alone deserve to rank
as true expressions, I will in the present chapter almost confine myself
to the lower animals.

When a dog approaches a strange dog or man in a savage or hostile frame
of mind be walks upright and very stiffly; his head is slightly raised,
or not much lowered; the tail is held erect, and quite rigid;
the hairs bristle, especially along the neck and back; the pricked ears
are directed forwards, and the eyes have a fixed stare: (see figs.
5 and 7). These actions, as will hereafter be explained, follow from the dog's
intention to attack his enemy, and are thus to a large extent intelligible.
As he prepares to spring with a savage growl on his enemy, the canine
teeth are uncovered, and the ears are pressed close backwards on
the head; but with these latter actions, we are not here concerned.
Let us now suppose that the dog suddenly discovers that the man
he is approaching, is not a stranger, but his master; and let it be
observed how completely and instantaneously his whole bearing is reversed.
Instead of walking upright, the body sinks downwards or even crouches,
and is thrown into flexuous movements; his tail, instead of being
held stiff and upright, is lowered and wagged from side to side;
his hair instantly becomes smooth; his ears are depressed and drawn
backwards, but not closely to the head; and his lips hang loosely.
From the drawing back of the ears, the eyelids become elongated,
and the eyes no longer appear round and staring. It should be added
that the animal is at such times in an excited condition from joy;
and nerve-force will be generated in excess, which naturally leads
to action of some kind. Not one of the above movements, so clearly
expressive of affection, are of the least direct service to the animal.
They are explicable, as far as I can see, solely from being in complete
opposition or antithesis to the attitude and movements which,
from intelligible causes, are assumed when a dog intends to fight,
and which consequently are expressive of anger. I request the reader
to look at the four accompanying sketches, which have been given in order
to recall vividly the appearance of a dog under these two states of mind.
It is, however, not a little difficult to represent affection in a dog,
whilst caressing his master and wagging his tail, as the essence of


the expression lies in the continuous flexuous movements.

We will now turn to the cat. When this animal is threatened by a dog,
it arches its back in a surprising manner, erects its hair,
opens its mouth and spits. But we are not here concerned with this
well-known attitude, expressive of terror combined with anger;
we are concerned only with that of rage or anger. This is not often seen,
but may be observed when two cats are fighting together; and I have
seen it well exhibited by a savage cat whilst plagued by a boy.
The attitude is almost exactly the same as that of a tiger disturbed and
growling over its food, which every one must have beheld in menageries.
The animal assumes a crouching position, with the body extended;
and the whole tail, or the tip alone, is lashed or curled from
side to side. The hair is not in the least erect. Thus far,
the attitude and movements are nearly the same as when the animal is
prepared to spring on its prey, and when, no doubt, it feels savage.
But when preparing to fight, there is this difference, that the ears
are closely pressed backwards; the mouth is partially opened,
showing the teeth; the fore feet are occasionally struck out with
protruded claws; and the animal occasionally utters a fierce growl.
(See figs. 9 and 10.) All, or almost all these actions naturally follow
(as hereafter to be explained), from the cat's manner and intention
of attacking its enemy.

Let us now look at a cat in a directly opposite frame of mind,
whilst feeling affectionate and caressing her master;
and mark how opposite is her attitude in every respect.
She now stands upright with her back slightly arched,
which makes the hair appear rather rough, but it does not bristle;
her tail, instead of being extended and lashed from side
to side, is held quite still and perpendicularly upwards;
her ears are erect and pointed; her mouth is closed;
and she rubs against her master with a purr instead of a growl.
Let it further be observed how widely different is the whole
bearing of an affectionate cat from that of a dog, when with
his body crouching and flexuous, his tail lowered and wagging,
and ears depressed, he caresses his master. This contrast
in the attitudes and movements of these two carnivorous animals,
under the same pleased and affectionate frame of mind,
can be explained, as it appears to me, solely by their movements
standing in complete antithesis to those which are naturally assumed,
when these animals feel savage and are prepared either to fight
or to seize their prey.

In these cases of the dog and cat, there is every reason to believe
that the gestures both of hostility and affection are innate or inherited;
for they are almost identically the same in the different races
of the species, and in all the individuals of the same race,
both young and old.

I will here give one other instance of antithesis in expression.
I formerly possessed a large dog, who, like every other dog,
was much pleased to go out walking. He showed his pleasure
by trotting gravely before me with high steps, head much raised,
moderately erected ears, and tail carried aloft but not stiffly.
Not far from my house a path branches off to the right, leading to
the hot-house, which I used often to visit for a few moments, to look
at my experimental plants. This was always a great disappointment
to the dog, as he did not know whether I should continue my walk;
and the instantaneous and complete change of expression which came
over him as soon as my body swerved in the least towards the path
(and I sometimes tried this as an experiment) was laughable.
His look of dejection was known to every member of the family, and was
called his _hot-house face_. This consisted in the head drooping much,
the whole body sinking a little and remaining motionless; the ears
and tail falling suddenly down, but the tail was by no means wagged.
With the falling of the ears and of his great chaps, the eyes
became much changed in appearance, and I fancied that they looked
less bright. His aspect was that of piteous, hopeless dejection;
and it was, as I have said, laughable, as the cause was so slight.
Every detail in his attitude was in complete opposition to his former
joyful yet dignified bearing; and can be explained, as it appears
to me, in no other way, except through the principle of antithesis.
Had not the change been so instantaneous, I should have attributed
it to his lowered spirits affecting, as in the case of man,
the nervous system and circulation, and consequently the tone of his
whole muscular frame; and this may have been in part the cause.


We will now consider how the principle of antithesis in expression
has arisen. With social animals, the power of intercommunication
between the members of the same community,--and with other species,
between the opposite sexes, as well as between the young and the old,--
is of the highest importance to them. This is generally
effected by means of the voice, but it is certain that gestures
and expressions are to a certain extent mutually intelligible.
Man not only uses inarticulate cries, gestures, and expressions,
but has invented articulate language; if, indeed, the word INVENTED
can be applied to a process, completed by innumerable steps,
half-consciously made. Any one who has watched monkeys will not doubt
that they perfectly understand each other's gestures and expression,
and to a large extent, as Rengger asserts,[1] those of man.
An animal when going to attack another, or when afraid of another,
often makes itself appear terrible, by erecting its hair,
thus increasing the apparent bulk of its body, by showing its teeth,
or brandishing its horns, or by uttering fierce sounds.

As the power of intercommunication is certainly of high service to
many animals, there is no _a priori_ improbability in the supposition,
that gestures manifestly of an opposite nature to those by which certain
feelings are already expressed, should at first have been voluntarily
employed under the influence of an opposite state of feeling.
The fact of the gestures being now innate, would be no valid objection
to the belief that they were at first intentional; for if practised
during many generations, they would probably at last be inherited.
Nevertheless it is more than doubtful, as we shall immediately see,
whether any of the cases which come under our present head of antithesis,
have thus originated.

With conventional signs which are not innate, such as those
used by the deaf and dumb and by savages, the principle of
opposition or antithesis has been partially brought into play.
The Cistercian monks thought it sinful to speak, and as they
could not avoid holding some communication, they invented
a gesture language, in which the principle of opposition seems
to have been employed.[2] Dr. Scott, of the Exeter Deaf and
Dumb Institution, writes to me that "opposites are greatly used
in teaching the deaf and dumb, who have a lively sense of them."
Nevertheless I have been surprised how few unequivocal instances
can be adduced. This depends partly on all the signs having
commonly had some natural origin; and partly on the practice
of the deaf and dumb and of savages to contract their signs as much
as possible for the sake of rapidity?[3] Hence their natural
source or origin often becomes doubtful or is completely lost;
as is likewise the case with articulate language.


[1] `Naturgeschichte der Saugethiere von Paraguay,' 1830, s. 55.

[2] Mr. Tylor gives an account of the Cistercian gesture-language
in his `Early History of Mankind' (2nd edit. 1870, p. 40), and makes
some remarks on the principle of opposition in gestures.

[3] See on this subject Dr. W. R. Scott's interesting work, `The Deaf
and Dumb,' 2nd edit. 1870, p. 12. He says, "This contracting
of natural gestures into much shorter gestures than the natural
expression requires, is very common amongst the deaf and dumb.
This contracted gesture is frequently so shortened as nearly to lose
all semblance of the natural one, but to the deaf and dumb who use it,
it still has the force of the original expression."

Many signs, moreover, which plainly stand in opposition to each other,
appear to have had on both sides a significant origin.
This seems to hold good with the signs used by the deal and dumb
for light and darkness, for strength and weakness, &c. In a future
chapter I shall endeavour to show that the opposite gestures of
affirmation and negation, namely, vertically nodding and laterally
shaking the head, have both probably had a natural beginning.
The waving of the hand from right to left, which is used as a negative
by some savages, may have been invented in imitation of shaking the head;
but whether the opposite movement of waving the hand in a straight
line from the face, which is used in affirmation, has arisen through
antithesis or in some quite distinct manner, is doubtful.

If we now turn to the gestures which are innate or common to all
the individuals of the same species, and which come under the present
head of antithesis, it is extremely doubtful, whether any of them
were at first deliberately invented and consciously performed.
With mankind the best instance of a gesture standing in direct opposition
to other movements, naturally assumed under an opposite frame of mind,
is that of shrugging the shoulders. This expresses impotence or
an apology,--something which cannot be done, or cannot be avoided.
The gesture is sometimes used consciously and voluntarily, but it
is extremely improbable that it was at first deliberately invented,
and afterwards fixed by habit; for not only do young children
sometimes shrug their shoulders under the above states of mind,
but the movement is accompanied, as will be shown in a future chapter,
by various subordinate movements, which not one man in a thousand
is aware of, unless he has specially attended to the subject.

Dogs when approaching a strange dog, may find it useful to show by their
movements that they are friendly, and do not wish to fight. When two young
dogs in play are growling and biting each other's faces and legs, it is
obvious that they mutually understand each other's gestures and manners.
There seems, indeed, some degree of instinctive knowledge in puppies
and kittens, that they must not use their sharp little teeth or claws
too freely in their play, though this sometimes happens and a squeal
is the result; otherwise they would often injure each other's eyes.
When my terrier bites my hand in play, often snarling at the same time,
if he bites too hard and I say GENTLY, GENTLY, he goes on biting,
but answers me by a few wags of the tail, which seems to say "Never mind,
it is all fun." Although dogs do thus express, and may wish to express,
to other dogs and to man, that they are in a friendly state of mind,
it is incredible that they could ever have deliberately thought of drawing
back and depressing their ears, instead of holding them erect,--of lowering
and wagging their tails, instead of keeping them stiff and upright,
&c., because they knew that these movements stood in direct opposition
to those assumed under an opposite and savage frame of mind.

Again, when a cat, or rather when some early progenitor of the species,
from feeling affectionate first slightly arched its back, held its
tail perpendicularly upwards and pricked its ears, can it be believed
that the animal consciously wished thus to show that its frame
of mind was directly the reverse of that, when from being ready
to fight or to spring on its prey, it assumed a crouching attitude,
curled its tail from side to side and depressed its ears?
Even still less can I believe that my dog voluntarily put on his
dejected attitude and "_hot-house face_," which formed so complete
a contrast to his previous cheerful attitude and whole bearing.
It cannot be supposed that he knew that I should understand
his expression, and that he could thus soften my heart and make me
give up visiting the hot-house.

Hence for the development of the movements which come under
the present head, some other principle, distinct from the will
and consciousness, must have intervened. This principle appears
to be that every movement which we have voluntarily performed
throughout our lives has required the action of certain muscles;
and when we have performed a directly opposite movement,
an opposite set of muscles has been habitually brought into play,--
as in turning to the right or to the left, in pushing away or
pulling an object towards us, and in lifting or lowering a weight.
So strongly are our intentions and movements associated together,
that if we eagerly wish an object to move in any direction,
we can hardly avoid moving our bodies in the same direction,
although we may be perfectly aware that this can have no influence.
A good illustration of this fact has already been given in
the Introduction, namely, in the grotesque movements of a young
and eager billiard-player, whilst watching the course of his ball.
A man or child in a passion, if he tells any one in a loud voice
to begone, generally moves his arm as if to push him away,
although the offender may not be standing near, and although there
may be not the least need to explain by a gesture what is meant.
On the other hand, if we eagerly desire some one to approach
us closely, we act as if pulling him towards us; and so in
innumerable other instances.

As the performance of ordinary movements of an opposite kind,
under opposite impulses of the will, has become habitual in us
and in the lower animals, so when actions of one kind have become
firmly associated with any sensation or emotion, it appears natural
that actions of a directly opposite kind, though of no use,
should be unconsciously performed through habit and association,
under the influence of a directly opposite sensation or emotion.
On this principle alone can I understand how the gestures and expressions
which come under the present head of antithesis have originated.
If indeed they are serviceable to man or to any other animal,
in aid of inarticulate cries or language, they will likewise be
voluntarily employed, and the habit will thus be strengthened.
But whether or not of service as a means of communication, the tendency
to perform opposite movements under opposite sensations or emotions would,
if we may judge by analogy, become hereditary through long practice;
and there cannot be a doubt that several expressive movements due
to the principle of antithesis are inherited.

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