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imagine that the entire human race might easily have
gone the way of the ichthyosaurus but for the fact that
nature had endowed us with a little bigger brain and the
ability to compensate for our defects.
The dawn of mankind is shrouded in darkness, and our
interpretations must, perforce, remain conjectures. No
one knows how and when the transformation occurred.
Yet, if some sceptic were to doubt the above deductions,
we would still have very important biological data to
demonstrate the existence of a universal sense of
inferiority in all human beings. One of the most
significant and unique characteristics of man is the fact
that the growth of his mental faculties and the growth of
his physical apparatus for accomplishing his purposes
proceed at disproportionate speeds, the mental faculties
being well developed long before the physical apparatus
is capable of the required coordinations. This remarkable
fact is due to the late development of man’s brain, and
its relative completeness at birth, and it is this phenomenon
which distinguishes man from all other living animals,
in whom the growth of mental faculties and motor
apparatus proceeds in a nearly parallel curve.
The young robin which has grown old enough to
distinguish a worm has likewise developed physically to
the point where he can catch the worm and eat it. Kittens
pass through a relatively short period of helplessness,
but when they are old enough to know what a mouse is
they are simultaneously capable of stalking it, catching it,
and eating it. Young calves can distinguish poisonous
from edible grasses at an early age. Young turtles are
barely hatched from their eggs when they make unerringly
for the sea, and begin life as independent organisms.
Contrast the situation of the human baby ! The baby can
recognize its bottle long before it is old enough to reach
for it and feed itself. The baby cries if it is uncomfortable,
but the satisfaction of its wishes depends entirely upon
the good will of a parent or a nurse. Long before the
child can walk, it can realize that its parents move with
comparative ease. The mysteries ot speech remain