Through Vague Epochs
impellent force is personality urged by the interaction between need and longing. Words are inventions of the mind, which the brain, the nerves, and the muscles have learned to use.
During the long period from somewhere well within the Miocene and extending through the Pliocene Age, a steady and coincident development took place of the hand, the brain, the powers of upright locomotion, and of speech. Already, as we have seen, in Early Quaternary Times this development had reached the flower called human.
At this time we find our prehistoric human ancestors in Europe. They walk as we walk; they have our hands and brains. Their speech is rudimentary, but the brain-centers related to the higher senses are well developed, and they control perfectly all motions of the bodily members. The anterior centers of the brain are keenly awake, and they have long been busy in the hoarding of experience and the developing of ideas. Fifty thousand or
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