3.5.2 Statement Relative to Man’ s Tendencies to Act

Man may normally be expected to respond in a particular way to a particular stimulus because men throughout the history of the race have so responded.

Certain connections have been established in his nervous system and he acts accordingly—he does what he does because he is man.

We cannot here go into a detailed discussion of the physiological processes involved in thinking and other forms of behavior, but perhaps we may well set down a statement or two relative to man’s tendencies to act, and their explanations:

“The nervous system is composed of neurones of three types: Those that receive, the afferent; those that effect action, the efferent; and those that connect, the associative. The meeting places of these neurones are the synapses. All neurones have the three characteristics of sensitivity, conductivity, and modifiability. In order for conduct or feeling or intellect to be present, at least two neurones must be active, and in all but a few of the human activities many more are involved. The possibility of conduct or intelligence depends upon the connections at the synapses,—upon the possibility of the current affecting neurones in a certain definite way. The possession of an ‘original nature,’ then, means the possession, as a matter of inheritance, of certain connections between neurones, the possession of certain synapses which are in functional contact and across which a current may pass merely as a matter of structure. Just why certain synapses should be thus connected is the whole question of heredity. Two factors seem to affect the functional contact of a [42]synapses,—first, proximity of the neurone ends, and second, some sort of permeability which makes a current travel on one rather than another of two neurones equally near together in space. This proximity and permeability are both provided for by the structure and constitution of the nervous system. It should be noted that the connection of neurones is not a one-to-one affair, but the multiplicity of fibrils provided by original nature makes it possible for one afferent to discharge into many neurones, and for one efferent neurone to receive the current from many neurones. Thus the individual when born is equipped with potentialities of character, intellect and conduct, because of the pre-formed connections or tendencies to connections present in his nervous system.

“Types of Original Responses.—These unlearned tendencies which make up the original nature of the human race are usually classified into automatic or physiological actions, reflexes, instincts, and capacities. Automatic actions are such as those controlling the heart-beats, digestive and intestinal movements; the contraction of the pupil of the eye from light, sneezing, swallowing, etc., are reflexes; imitation, fighting, and fear, are instincts, which capacities refer to those more subtle traits by means of which an individual becomes a good linguist, or is tactful, or gains skill in handling tools. However, there is no sharp line of division between these various unlearned tendencies; what one psychologist calls a reflex or a series of reflexes, another will call an instinct. It seems better to consider them as of the same general character but differing from each other in simplicity, definiteness, uniformity of response, variableness among individuals, and modifiability. They range from movements such as the action of the blood vessels to those concerned in hunting and collecting; from the simple, definite, uniform knee-jerk, which is very similar in all people and open to very little modification, to the capacity for scholarship, which is extremely complex, vague as to definition, variable both as to manifestation in one individual and amounts amongst people in general, and is open to almost endless modification. This fund of unlearned tendencies is the capital with which each child starts, the capital which makes education and progress possible, as well as the capital which limits the extent to which progress and development in any line may proceed.” The Psychology of Childhood, pp. 21, 22, 23.

Weigle, in his Talks to Sunday School Teachers, begins his second chapter in a rather unique and helpful manner relative to this same question:

“The little human animal, like every other, is born going. He is already wound up. His lungs expand and contract; his heart is pumping away; his stomach is ready to handle food. These organic, vital activities he does not initiate. They begin themselves. The organism possesses them by nature. They are the very conditions of life.

“There are many other activities, not so obviously vital as these, for which nature winds him up quite as thoroughly—yes, and sets him to go off at the proper time for each. He will suck when brought to the breast as unfailingly as his lungs will begin to work upon contact with the air. He will cry from hunger or discomfort, clasp anything that touches his fingers or toes, carry to his mouth whatever he can grasp, in time smile when smiled at, later grow afraid when left alone or in the dark, manifest anger and affection, walk, run, play, question, imitate, collect things, pull things apart, put them together again, take pleasure in being with friends, act shy before strangers, find a chum, belong to a ‘gang’ or ‘bunch,’ quarrel, fight, become reconciled, and some day fall in love with one of the opposite sex. These, and many more, are just his natural human ways. He does not of purpose initiate them any more than he initiates breathing or heart-beat. He does these things because he is so born and built. They are his instincts.”

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