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Show Progress of Humanity Shown to Be Parallel With Growth of the Brain By DR. FREDERICK TILNEY, Columbia University. When the brains of all the prehistoric men we know are placed side by side, there is not a question of a doubt about progress and development, develop-ment, which is sufficient to convince the most skeptical. There is a definite defi-nite increase in the width of the brain, expanding those areas which have to do with sensation and the part of the brain which has to do with the higher faculties of reason and judgment. There can be little doubt that the progress of humanity has run parallel with the growth of the brain. From one age to another and from one race to the next man has shown a steady gain in his power to control material conditions. Where he has stood still or perhaps even fallen be hind is in learning to control his own nature. The human cerebrum certainly marks the advance of the intelligence step by step, and yet, for the most part, the human cerebrum is looked upon as a finished product. Its evolutionary history does not bear out this view. It makes it seem much more probable that the brain of modern mod-ern man is an intermediate stage in the ultimate differentiation of the master organ of life. In this sense the prehistoric brain is of more than antiquarian interest. It has a definite and living bearing upon the future fu-ture progress of the race. |
