§ 5 The Wolf-type of Man Established by Natural Selection
The differentiation of the human from the anthropoid stock must have begun a long time ago; as to when it began there is no direct evidence; and even if fossil remains of the earlier stages of our evolution had been discovered, we could only judge from the strata in which they occurred what must have been their relative antiquity. When it comes to reducing the chronology of past ages to figures, geologists either decline to make any estimate, or the results of their calculations may differ as 1 to 10. Since my own studies give me no claim to an opinion on such matters, whilst it is helpful to have clear ideas, however tentative, I shall adopt the views of Dr. Arthur Keith in his work on The Antiquity of Man, based on estimates published by Prof. Sollas.53 On turning to p. 509 of that work, a genealogical tree will be found, showing the probable lines of descent of the higher Primates. The separation of the human from the great anthropoid stock is represented as having happened at about the last third of the Oligocene period—say 2,000,000 years ago (or, according to the later estimate, 3,500,000). Pithecanthropus (of Java) branched off as a distinct genus about the middle of the Miocene. Neanderthal man (Homo Neanderthalensis) and Piltdown man (Eoanthropus Dawsoni) separated as distinct species (or genera) from the stock of modern man (absurdly named Homo sapiens) early in the Pliocene, and became extinct respectively (say) 20,000 and 300,000 years ago. The races of modern man began to differentiate near the end of the Pliocene (say) 500,000 years from the present time. Such is the “working hypothesis.”
The skull capacity of the great anthropoids averages 500 c.c.; that of Pithecanthropus is estimated at 900 c.c.; the Australian native average is 1200 c.c.; Eoanthropus, according to Dr. Keith, rises to 1400;54 a Neanderthal skull has been measured at 1600 c.c.; the modern English average is under 1500 c.c. Of course, mental power depends not on size of the brain only, but also on its differentiation, which may have recently advanced.
As to culture, the Neolithic period extends in Western Europe from about 2000 to 10,000 B.C.: and to that age is usually attributed the introduction of agriculture, the domestication of animals, pottery, weaving, permanent constructed dwellings, and monuments requiring collective labour; but some of these improvements may be of earlier date. In other parts of the world, e. g. in the Eastern Mediterranean region, such culture is probably older, but still comparatively recent. What is known as the Palæolithic stage of culture is often supposed to have begun early in the second quarter of the Pleistocene period, giving us a retrospect of (say) 300,000 years. But if we include under “Palæolithic” all unpolished stone-work that shows clear signs of having been executed according to an idea or mental pattern (and this seems a reasonable definition), the “rostro-carinate” implements must be so called, and then the beginning of this culture must be pushed back into the Pliocene.55 In Pliocene (and perhaps Miocene) deposits have further been discovered numerous “eoliths”: stones so roughly chipped that they do not imply an idea-pattern; so that, whilst many archæologists accept them as of human workmanship, some experts dispute their claim to be considered artefacts. Of course, there must be eoliths; the only question is whether we have yet unearthed any of them. Our forefathers cannot have begun by shaping stones to a definite figure and special purpose. Beginning with stones taken up as they lay, they discovered that a broken stone with a sharp edge inflicted a worse wound than a whole one; then broke stones to obtain this advantage; used sharp fragments to weight clubs; and very slowly advanced to the manufacture of recognisable axes and spear-heads, meanwhile discovering other uses for flaked stones; and it seems to have needed at least 1,400,000 (or 2,800,000) years to arrive at the poorest of known palæoliths. This strikingly agrees with the law, often stated, that the progress of culture is, by virtue of tradition, cumulative, and flows, as a stone falls, with accelerating velocity: in spite of the ebb, to which from age to age we see it to be liable. At any one time, moreover, the art of stone-working was, probably, even in adjacent tribes, at different stages of advancement; it depends partly upon the kind of stone obtainable; but it has been only recently that such contrasts could occur as Herodotus56 describes among the hosts of Xerxes: when, beside the well-accoutred Persians and Medes, marched Libyans and Mysians armed with wooden javelins hardened in the fire, and Ethiopians with stone-tipped arrows and spears headed with the sharpened horns of antelopes.
The moral of all this is that there was abundant time before the rise of Neolithic culture (which may be called the beginning of civilisation) for the complete adaptation of mankind everywhere, by natural selection, to the life of hunters; and that, since then, there has not been time for the biological adaptation of any race to the civilised state. We shall see that natural selection has probably had some civilising influence; but any approach to complete adaptation has been impossible, not only for want of time, but also because of rapid changes in the structure of civilisation, the social protection of some eccentrics, the persistence of the hunting-life as a second resource or as a pastime, and by the frequent recurrence of warfare—that is to say, man-hunting. To civilisation we are, for the most part, merely accommodated by experience, education, tradition and social pressure. A few people seem to be adapted to civilised life from their birth, and others to the slavish life; but all inherit, more or less manifestly, the nature of the hunter and warrior. This is a necessary basis of general and social psychology; and perhaps tribal or national characters (so far as distinguishable) may be understood by assigning the conditions under which they have, in various directions, been modified from this type.
To avoid the appearance of overlooking an obvious objection, I may add that the life of the hunter does not imply an exclusively carnivorous diet, but merely that hunting is the activity upon which his faculties are bent and upon which his livelihood chiefly depends. It is most unlikely that a cousin of the frugivorous anthropoids should entirely give up his ancestral food, immediately, or perhaps at any time. Even the diet of the wolf, in North-East Canada, includes “much fruit, especially the uva-ursi”; and the coyote there also eats berries;57 so does the jackal in India. Savage women everywhere subsist largely on roots and fruits. Dr. Keith says the teeth and jaws of the Neanderthal species were adapted to a coarse vegetable diet.58 Yet the Neanderthal burials at La Ferrasie, La Chapelle aux Saints, Jersey and Krapina, with their implements and animal remains, leave no doubt that the species hunted the biggest game. At Krapina, besides mammoth and rhinoceros, “the cave-bear occurred abundantly, it was evidently a favourite article of diet”: the inhabitants were not fanatical vegetarians.