These non-volitional movements of earliest infancy and of later childhood (such as licking things, clicking with the tongue, grinding the teeth, biting the nails, shrugging corrugations, pulling buttons, or twisting garments, strings, etc., twirling pencils, etc.) are relics of past forms of utilities now essentially obsolete. Ancient modes of locomotion, prehension, balancing, defense, attack, sensuality, etc., are all rehearsed, some quite fully and some only by the faintest mimetic suggestion, flitting spasmodic tensions, gestures, or facial expressions.
Human nature may therefore be regarded on the whole as a superstructure founded on instincts, dispositions, and tendencies, inherited from a long line of human and animal ancestors. It consists mainly in a higher organization of forces, a more subtle distillation of potencies latent in what Thorndike calls "the original nature of man."
The original nature of man is roughly what is common to all men minus all adaptations to tools, houses, clothes, furniture, words, beliefs, religions, laws, science, the arts, and to whatever in other men's behavior is due to adaptations to them. From human nature as we find it, take away, first, all that is in the European but not in the Chinaman, all that is in the Fiji Islander but not in the Esquimaux, all that is local or temporary. Then take away also the effects of all products of human art. What is left of human intellect and character is largely original--not wholly, for all those elements of knowledge which we call ideas and judgments must be subtracted from his responses. Man originally possesses only capacities which, after a given amount of education, will produce ideas and judgments.
Such, in general, is the nature of human beings before that nature has been modified by experience and formed by the education and the discipline of contact and intercourse with their fellows.
Several writers, among them William James, have attempted to make a rough inventory of the special instinctive tendencies with which human beings are equipped at birth. First of all there are the simpler reflexes such as "crying, sneezing, snoring, coughing, sighing, sobbing, gagging, vomiting, hiccuping, starting, moving the limb in response to its being tickled, touched or blown upon, spreading the toes in response to its being touched, tickled, or stroked on the sole of the foot, extending and raising the arms at any sudden sensory stimulus, or the quick pulsation of the eyelid."