I. Haeckel and His Opponents
[^6]: Human and Animal Psychology. The merit of having proved that there is no real contrast between the soul of man and that of animals, but that the mental activities of man are linked to those of animals as a higher form thereof in a perfectly natural chain of development, belongs to George Romanes, who, in a comprehensive work, Mental Evolution in Animals (vol. i) and Mental Evolution in Man and the Origin of Human Faculties (vol. ii), has shown, “that the psychological barrier between animal and man has been surmounted.”
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