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In Scandanavia, 'Iverson finds that the whole spectrum of pollen deposits is altered when (in early Neolithic times) ... the first farmers appear. Cereal pollens increase. Plants of oak woodland lessen and disappear; birch pollen increases rapidly
it is one of the trees which can come in after an extensive burn. For the pollen record, the effect of early agriculture is as severe as a shift in climate.
Biological evidence indicates that man, evolving with his food plants, developed horticulture and agriculture in both hemispheres at a time which may well have reached far back into the Pleistocene.
Considering the comparative lifespans of simpler tribal societies and that of the more advanced agri-urban empires of antiquity, even here in the New World, it would be possible, indeed, to make out quite a case for illiteracy as a factor of the safety in keeping population and essential supplies in a working balance, with little or no damage to the basic sources of renewal.
