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man, we find a vast contrast in his cranial capacity as compared with the lowest of the prehistoric types, or, indeed, of the lowest types of the uncultured living races.

      Starting with the Anthropoid ape, who has a register of about 350 c.c., the Pithecanthropus about 900 c.c., and Neanderthal types registering as high as 1,620 c.c. of brain capacity, the best measures of the highest types of modern man show the brain capacity of 1,650 c.c. Specimens of the Crô-Magnon skulls show a brain capacity equal to that of modern man. There is a great variation in the brain capacity of the Neanderthal race as exhibited in specimens found in different centres of culture, ranging all the way from 1,296 c.c. to 1,620 c.c. Size is only one of several traits that determine brain power. Among others are the weight, convolutions, texture, and education. A small, compact brain may have more power than a larger brain relatively lighter. Also much depends upon the centres of development. The development of the frontal area, shown by the full forehead in connection with the distance above the ear (auditory meatus), in contrast with the development of the anterior lobes is indicative of power.

      It is interesting to note also that the progress of man as shown in the remnants of arts and industry corresponds in development to the development of brain capacity, showing that the physical power of man kept pace with the mental development as exhibited in his mental power displayed in the arts and industries. The discoveries in recent times of the skeletons of prehistoric man in Europe, Africa, and America, and the increased collection of implements showing cultures are throwing new light on the science of man and indicating a continuous development from very primitive beginnings.

       Progress Is Indicated by the Early Cultures. – It is convenient to divide the early culture of man, based upon his development in art into the Paleolithic, or unpolished, and the Neolithic, or polished, Stone Ages.2 The former is again divided into the Eolithic, Lower Paleolithic, and the Upper Paleolithic. In considering these divisions of relative time cultures, it must be remembered that the only way we have of measuring prehistoric time is through the geological method, based upon the Ice Ages and changes in the physical contour of the earth.

      In the strata of the earth, either in the late second inter-glacial period or at the beginning of the third, chipped rocks, or eoliths, are found used by races of which the Piltdown and Heidelberg species are representatives.3 Originally man used weapons to hammer and to cut already prepared by nature. Sharp-edged flints formed by the crushing of rocks in the descent of the glaciers or by upheavals of earth or by powerful torrents were picked up as needed for the purpose of cutting. Wherever a sharp edge was needed, these natural implements were useful. Gradually man learned to carry the best specimens with him. These he improved by chipping the edges, making them more serviceable, or chipping the eolith, so as to grasp it more easily. This represents the earliest relic of the beginning of civilization through art. Eoliths of this kind are found in Egypt in the hills bordering the Nile Valley, in Asia and America, as well as in southern Europe. Perhaps at the same period of development man selected stones suitable for crushing bones or for other purposes when hammering was necessary. These were gradually fashioned into more serviceable hammers. In the latter part of this period, known as the pre-Chellean, flint implements were considerably improved.

      In the Lower Paleolithic in the pre-Neanderthal period, including what is known as the Chellean, new forms of implements are added to the earlier beginnings. Almond-shaped flint implements, followed later by long, pointed implements, indicate the future development of the stone spear, arrowhead, knife, and axe. Also smaller articles of use, such as borers, scrapers, and ploughs, appeared. The edges of all implements were rough and uneven, and the forms very imperfect.

      Industrial and Social Life of Primitive Man. – In the industry of the early Neanderthal races (Acheulean) implements were increased in number and variety, being also more perfectly formed, showing the expansive art of man. At this period man was a hunter, having temporary homes in caves and shelters, which gradually became more or less permanent, and used well-fashioned implements of stone. At the close of the third interglacial period the climate was mild and moist, and mankind found the open glades suitable places for assemblages in family groups about the open fires; apparently the cooking of food and the making of implements and clothing on a small scale were the domestic occupations at this time. Hunting was the chief occupation in procuring food. The bison, the horse, the reindeer, the bear, the beaver, the wild boar had taken the place of the rhinoceros, the sabre-tooth tiger, and the elephant.

      Judging from the stage of life existing at this time, and comparing this with that of the lowest living races, we may safely infer that the family associations existed at this time, even though the habitations in caves and shelters were temporary.4

      "Yet, when at length rude huts they first devised,

      And fires and garments; and in union sweet

      Man wedded woman, the pure joys indulged

      Of chaste connubial love, and children rose,

      The rough barbarians softened. The warm hearth

      Their frames so melted they no more could bear,

      As erst, th' uncovered skies. The nuptial bed

      Broke their wild vigor, and the fond caress

      Of prattling children from the bosom chased

      Their stern, ferocious manners."

– LUCRETIUS, "ON THE NATURE OF THINGS."AFTER OSBORN.

      Thus the Lower Paleolithic merged into the Upper; with the appearance of the Mousterian, Augrignacian, Solutrian, Magdalenian, and Azilian cultures followed the most advanced stage of the Neanderthal race before its final disappearance. The list of tools and implements indicates a widening scope of civilization. For war and chase and fishing, for industry and domestic life, for art, sculpture, and engraving, and for ceremonial use, a great variety of implements of stone and bone survived the life of the races.

      Spears, daggers, knives, arrowheads, fish-hooks, and harpoons; hand-axes, drills, hammers, scrapers, planes, needles, pins, chisels, wedges, gravers, etchers, mortars, and pilasters; ceremonial staffs and wands – all are expressions of a fulness of industrial and social life not recognized in earlier races. Indications of religious ceremonies represent the changing mind, and the expression of mind in art suggests increased mental power.

      Cultures Indicate the Mental Development of the Race. – As the art and industry to-day represent the mental processes of man, so did these primitive cultures show the inventive skill and adaptive power in the beginnings of progress. Perhaps instinct, emotion, and necessity figured more conspicuously in the early period than reflective thought, while in modern times we have more design and more planning, both in invention and construction. Also the primitive social order was more an unconscious development, and lacked purpose and directing power in comparison with present life.

      But there must have been inventors and leaders in primitive times, some brains more fertile than others, that made change and progress possible. Who these unknown geniuses were human records do not indicate. In modern times we single out the superiors and call them great. The inventor, the statesman, the warrior, the king, have their achievements heralded and recorded in history. The records of achievement of the great barbarous cultures, of the Assyrians, the Egyptians, and the Hebrews, centre around some king whose tomb preserves the only records, while in reality some man unknown to us was the real author of such progress as was made. The reason is that progress was so slow that the changes passed unnoticed, being the products of many minds, each adding its increment of change. Only the king or ruler who could control the mass mind and the mass labor could make sufficient spectacular demonstration worth recording, and could direct others to build a tomb or record inscriptions to perpetuate his name.

      Men of Genius Cause the Mutations Which Permit Progress. – The toiling multitudes always use the products of some inventive genius. Some individual with specialized mental traits plans something different from social usages or industrial life which changes tradition and modifies the customs and habits of the mass. Whether he be statesman, inventor, philosopher, scientist, discoverer, or military leader, he usually receives credit for the

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