Such climatic variations still exercised great determinative force on the evolution of society. It was perhaps 30,000 years ago that the climate changes began which later made it possible for human beings to enter the Americas, crossing from Asia by a link either provided by ice or by land left exposed because the ice-caps contained so much of what is now sea-water and the sea-level was much lower. They moved southwards for thousands of years as they followed the game which had drawn them to the uninhabited continent. The Americas were from the start peopled by immigrants. But when the ice sheets retreated, huge transformations occurred to coasts, routes and food supplies. This was all as it had been for ages, but this time there was a crucial difference. Man was there. A new order of intelligence was available to use new and growing resources in order to cope with environmental change. The change to history, when conscious human action to control environment will increasingly be effective, is under way.
This may seem a big claim in the light of the resources early men possessed, judging by their tool kits and weaponry. Yet they already represent a huge range of capacities if we compare them with their predecessors. The basic tools of Homo sapiens were stone, but they were made to serve many more precise purposes than earlier tools and were made in a different way, by striking fl akes from a carefully prepared core. Their variety and elaboration are other signs of the growing acceleration of human evolution. New materials came into use in the Upper Palaeolithic, too, as bone and antler were added to the wood and flint of earlier workshops and armouries. These provided new possibilities of manufacture; the bone needle was a great step in the elaboration of clothing, pressure flaking enabled some skilled workmen to carry the refi nement of their flint blades to a point at which it seems non-utilitarian, so delicately thinned have they become. The fi rst man-made material, a mixture of clay with powdered bone, also makes its appearance. Weapons are improved. The tendency, which can be seen towards the end of the Upper Palaeolithic, for small flint implements to appear more frequently and for them to be more regularly geometrical suggests the making of more complex weapon points. In the same era come the invention and spread of the spear-thrower, the bow and arrow, and the barbed harpoon, used fi rst on mammals and later to catch fish. The last shows an extension of hunting – and therefore of resources – to water. Long before this, perhaps 600,000 years ago, hominins had gathered molluscs for food in China and doubtless elsewhere. With harpoons and perhaps more perishable implements such as nets and lines, new and richer aquatic sources of food (some created by the temperature changes of the last Ice Ages) could now be exploited, and this led to achievements in hunting, possibly connected with the growth of forests in post-glacial phases and with a new dependence on and knowledge of the movements of reindeer and wild cattle.
It is tempting to see support of this in the most remarkable and mysterious evidence of all which has survived the men of the Upper Palaeolithic: their art. It is the first of its kind of whose existence we can be sure. Earlier men or even man-like creatures may have scratched patterns in the mud, daubed their bodies, moved rhythmically in dance or spread flowers in patterns, but of such things we know nothing, because of them, if they ever happened, nothing has survived. Some creature took the trouble to accumulate little hoards of red ochre some 40,000 – 60,000 years ago, but the purpose of doing so is unknown. It has been suggested that two indentations on a Neanderthal gravestone are the earliest surviving art, but the fi rst plentiful and assured evidence comes in paintings on the walls of European caves. The first were made over 30,000 years ago and their number swells dramatically until we fi nd ourselves in the presence of a conscious art whose greatest technical and aesthetic achievements appear, without warning or forerunner, almost mature. They continue so for thousands of years until this art vanishes. Just as it has no ancestor, it leaves no descendant, though it seems to have employed many of the basic processes of the visual arts still in use today.
The Story of Our Ancestors: Homo Sapiens at the Heart of Africa
