to objectify and abstract. It is very difficult not to believe that it is this new strength which explains the last and greatest stride in prehistory, the invention of agriculture.
3
The Possibility of Civilization
Human beings have existed for at least twenty times as long as the civilizations they have created. The waning of the last Ice Age allowed the long march to civilization to be completed and is the immediate prelude to History. Within five or six thousand years a succession of momentous changes took place of which unquestionably the most important was an increase in food supply. Nothing so sharply accelerated human development or had such widespread results until the changes called industrialization which have gone on over the last three centuries.
One scholar summed up these changes which mark the end of prehistory as the ‘Neolithic revolution’. Here begins another little tangle of potentially misleading terminology, though the last we need consider in prehistory. Archaeologists follow the Palaeolithic era by the Mesolithic and that by the Neolithic (some add a fourth, the Chalcolithic, by which they mean a phase of society in which artifacts of stone and copper are in simultaneous use). The distinction between the first two is really of interest only to the specialist, but all these terms describe cultural facts; they identify sequences of artifacts which show growing resources and capacities. Only the term ‘Neolithic’ need concern us. It means, at its narrowest and most precise, a culture in which ground or polished stone tools replace chipped ones (though other criteria are sometimes added to this). This may not seem so startling a change as to justify the excitement over the Neolithic which has been shown by some prehistorians, far less talk of a ‘Neolithic revolution’. In fact, though the phrase is still sometimes used, it is unsatisfactory because it has had to cover too many different ideas. None the less, it was an attempt to pin down an important and complex change which took place with many local variations and it is worthwhile to try to assess its general significance.
We can start by noting that even in the narrowest technological sense, the Neolithic phase of human development does not begin, flower or end everywhere at the same time. In one place it may last thousands of years longer than in another and its beginnings are separated from what wentbefore, not by a clear line but by a mysterious zone of cultural change. Then, within it, not all societies possess the same range of skills and resources; some discover how to make pottery, as well as polished stone tools, others go on to domesticate animals and begin to gather or raise cereal crops. Slow evolution is the rule and not all societies had reached the same level by the time literate civilization appears. Nevertheless, Neolithic culture is the matrix from which civilization appears and provides the preconditions on which it rests, and they are by no means limited to the production of the highly finished stone tools which gave the phase its name.
We must also qualify the word ‘revolution’ when discussing this change. Though we leave behind the slow evolutions of the Pleistocene and move into an accelerating era of prehistory, there are still no clear-cut divisions. They are pretty rare in later history; even when they try to do so, few societies ever wholly break with their past. What we can observe is a slow but radical transformation of human behaviour and organization over more and more of the world, not a sudden new departure. It is made up of several crucial changes which make the last period of prehistory identifiable as a unity, whatever we call it.
At the end of the Upper Palaeolithic, Man existed physically much as we know him. He was, of course, still to change somewhat in height and weight, most obviously in those areas of the world where he gained in stature and life expectancy as nutrition improved. In the Old
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