Evolution and creation

by Herbert Junius Hardwicke

When the world had undergone sufficient evolutionary development there came a time when such atmospheric and other conditions were present as to permit of a modification of the then existing substances and properties, which resulted in the formation of the crystal; and, precisely in the same manner, and for the same reason, a further and later modification resulted in the formation of Protoplasm, which is the earliest form of animal life. This little substance gradually differentiated into two distinct parts, by a nucleus being formed in the centre of the protoplasmic mass, and became possessed with a peculiar power of locomotion, which caused a still greater difference to exist between itself and its ancestral stock. This power of locomotion, again, is but a modification of that life-power of which we have spoken, and forms a stepping-stone between the molecular action of mineral substances and the mental wonders of the human being. The crystal, in common with all other bodies in the mineral kingdom, always possessed this power of locomotion to a limited extent; every one of the individual atoms which make up the whole substance has always had the power of locomotion, for they all attract and repel each other and effect cohesions by their mutual attraction. This locomotive power underwent such a modification when cell-life (Protozoa) was manifested that not only were the constituent molecular atoms individually possessed of this power, as before, but the whole mass of the cell became endowed with the same property, just as a whole continent of free people who have been in the habit of defending themselves singly against their enemies sometimes combine and co-operate with each other in the form of a republic, the function of the individual being assumed by the body as a whole. The little cellular organisms, which are called Amœbæ, possess this extended power of locomotion, and may be seen constantly moving about in the endeavour to locate themselves in the brightest part of their dwelling place, frequently a little pond. They are attracted by light, which clearly proves that they possess a degree of sensory perception, although special sense-organs are of course wanting, the whole mass of the body being nothing more than a single cell composed of protoplasm and nucleus. These little cellular organisms soon unite with each other, forming small bodies composed of several cells in a state of cohesion (Synamœbæ), and on the surface of these multicellular organisms are shortly afterwards thrown out minute threads or ciliae, the first attempt at separation of sense-organs from the surface of the body. In these tiny Protozoa, those organisms which consist of one single cell only, the Amœbæ, as well as those consisting of several cells in a state of union, the Synamœbæ, are able to perform all the functions of animal life—cohesion, sensation, motion, digestion, and reproduction; but, as the organism becomes more and more complex, these different functions are shared among several groups of cells. This differentiation proceeds steadily stage by stage, until at last different senses are located in different parts of the body, and we find animals possessing eyes, ears, noses, and mouths, one organ performing the function of sight, another that of hearing, and so on. All these organs of sense are but parts of the general nervous organisation of the body, which is apparently absent in the Protista, but existing potentially in the protoplasmic substance, as it also does in every other substance in the universe.

The ciliated multiple cell-organism, in course of time, becomes transformed into a hollow body, having a wall composed of a single layer of cells, and this again, by invagination, or folding of itself within itself, forms a double-walled cavity, or Gastrula, having an external opening like a mouth. These little animals, the Gastrœada, having an inner layer of cells (the endoderm), which carries on the nutritive and assimilative functions of the organism, and an outer layer (the ectoderm), which forms the general motor and sense-organ of the body, are the first animal organisms to possess a real sense-organ separate and distinct from other parts of the body. From this epidermal organ of sense are developed, as higher forms of animal life make their appearance, the nerve-cells and sense-cells which form the whole nervous system.

In the fresh-water polyp, or Hydra, which is wanting in distinct organs of sense and nervous system, we find a remarkable sensitiveness to touch, warmth, and light, individual ectodermic neuro-muscular cells performing these functions, but a far greater sensibility being exhibited in the circle of fine prehensible tentacles surrounding the mouth than elsewhere. Here we have a marked attempt at localisation of sense-organs, and a manifestation of instinct, which makes the little animal shrink from the touch.

From the Hydræ evolved the Medusæ, which, instead of being dependent entirely on neuro-muscular cells like the parent forms, developed minute sets of nerves and muscles, by the use of which they became enabled to swim about easily and at their own will and pleasure. We get in this little animal the first appearance of real nerve function, or conductibility of stimulus along the nervous fibre to a muscle which it causes to contract—a totally different function to the contraction of the whole body upon a stimulus being applied to it, as in the case of the Hydræ.

In the worm forms, which evolve from the Gastrœada, we come across the first attempt at special sense-organ formation, in the shape of depressions on the integument of the body. The Himatega, or sack-worms, possess a rudimentary spinal cord, and were the parents of the first true vertebrates, organisms without skulls or brains, but with a true vertebral cord. These little vermiform animals, in addition to their rudimentary spinal cords, exhibited upon the surface of the body several small depressions, which answered the purpose of a set of special sense-organs, one tiny depression being set apart especially for the perception of light waves, another for the perception of sound waves, another for the perception of odours, etc.; and thus gradually came about that wonderful evolutionary process by which bodies became endowed with more or less perfect special sense-organs.

As the animal kingdom developed into higher and higher forms of life, and skulls and brains became the order of the day, the special sense-organs became possessed of larger powers, at the same time that the whole nervous organisation assumed higher and more complex functions, resulting eventually in a very gradual unfolding of the most wonderful of all the latent potentialities of universal life—the marvel of consciousness. This is the present climax of Nature’s evolution, the grandest and most awful achievement of that hidden and mysterious force which baffles comprehension, and beside which all things seen, heard, or felt pale into insignificance.

To point out the precise method of the evolution of mind, step by step, until the final climax of consciousness was reached, would require an abler pen than mine; therefore I shall be content to briefly notice the different products of intellectual development in the order in which they are unfolded, showing the analogy between ontogenesis, or the life-history of the individual, and phylogenesis, or that of the whole race, not now as regards bodily, but only mental, evolution. We must ever remember that the biogenetic law insists that the process of development in the race is reflected in miniature in the embryonic history of every individual. In other words, it is, beyond doubt, an accepted article of faith with biologists that the development of the individual from the embryo in utero to the full-grown man is an exact counterpart of the development of the whole race from the primitive protoplasmic atom, the lowly Moneron, to homo sapiens, equally in regard to mental as to bodily evolution.

Every human individual commences his term of separate existence as a tiny speck of protoplasm, and slowly advances through the phases of separate cell-life, multicellular existence, and the gastrula, vermiform, and pisciform stages, being finally born as a partially-developed member of the human family, from which moment he grows rapidly to the perfection of the adult state, having accomplished, in the short period of about a score of years, precisely what his counterpart, the race, effected in many millions of years. During the period in which the individual dwells in utero great and rapid modifications take place in the general construction of the fœtus; sensory perception makes its appearance very early, being followed quickly by the first attempt at differentiation of special sense-organs in the form of tiny surface depressions; the brain and spinal system gradually take shape and make ready for future action; and the little body slowly assumes a form suitable for separate extra-uterine existence. At the moment of birth the brain and special sense-organs are not yet developed to such a degree that they can properly discharge the functions they are called upon to perform in the mature state; they have to advance gradually to perfection in harmony with the growth of the whole body; and thus it is that a newly-born individual does not see, hear, or exhibit signs of consciousness until some time has elapsed from birth, although it is, at first, quite sensitive to cold and heat. If a lighted candle be held in front of the eyes of a newly-born infant, and moved to and fro, it will be at once observed that the child is totally unconscious of it; and, if a gun be fired off in the room occupied by the child, the effect upon the infantile organism is nil; but, if the air of the room be allowed to cool, the effect will be at once perceived, for the muscles of the child will soon begin to contract, and his vocal bellows to act vigorously. Gradually, however, the sight, hearing, etc., become adjusted, and the infant begins to take notice of surrounding objects, until at about a month after birth pain and pleasure, the first indications of the dawn of the mental powers, manifest themselves. Conscious, as distinguished from instinctive or non-conscious, memory appears to be exercised at about the thirteenth week, and to be immediately followed by association of ideas, the recognition of places and persons, and dreaming. At the same time that these indications of intellectual development are manifesting themselves, a corresponding unfolding of the emotions is observed. Side by side with memory appears fear, followed by pugnacity, play, and, later, anger; while, still later, about on a par with the first period of dreaming, or at about the age of five months, are manifested emulation, jealousy, joy, and grief. In about another month we notice that the child begins to understand words, while, on the emotional side, he evinces signs of awakening sympathy, curiosity, revenge, and gratitude, followed within a couple of months by pride, shame, deceitfulness, passionateness, cruelty, and ludicrousness, which show themselves at the moment the child appears to first exercise what we term true reason. From this point we see rapidly unfolded the higher products of intellectual development, the first of which is morality of a very indefinite kind, which immediately precedes articulation at the age of about fourteen months, being closely followed by knowledge of the use of various simple instruments, afterwards at the age of twenty months by concerted action, and still later by speech, which generally is effected at the age of two years, or rather earlier. Following quickly upon speech we observe judgment, recollection, and self-consciousness manifesting themselves, and, by the time the child has attained the age of two years and a half, morality of a definite kind makes its appearance.

Tracing the child’s development still further, we find the next important intellectual manifestation—viz., superstition—to take place at about three years of age, while concurrently the following emotional products appear—avarice, envy, hate, hope, vanity, mirth, and a love of the beautiful, which are followed, in the course of a few months, by awe and an appreciation of art. From this age to the condition of adult life, the intellectual faculties develop according to the surroundings of the individual, while, on the emotional side, reverence, remorse, and courtesy make their appearance at about the age of five years, and melancholy and ecstasy at about the tenth year.