Although cultures very often arose in splendid isolation, only very few remained splendidly isolated for very long. For much like a young child who having learned to walk intuitively understands what a powerful tool mobility is/can be and seeks to exploit it to the fullness of their abilities, so too did our youthful human civilisations very quickly understand that there was, in all probability, a world beyond their own, and began wandering, at first in their immediate vicinity but
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