his existence, he was led irrevocably to think of those human
foes who warred with him, and to see, back of the warfare of the
elements, an inscrutable malevolent intelligence which took this
method to express its displeasure. But every other line of
scientific observation leads equally, following back a sequence
of events, to seemingly causeless beginnings. Modern science can
explain the lightning, as it can explain a great number of the
mysteries which the primeval intelligence could not penetrate.
But the primordial man could not wait for the revelations of
scientific investigation: he must vault at once to a final
solution of all scientific problems. He found his solution by
peopling the world with invisible forces, anthropomorphic in
their conception, like himself in their thought and action,
differing only in the limitations of their powers. His own dream
existence gave him seeming proof of the existence of an alter
ego, a spiritual portion of himself that could dissever itself
from his body and wander at will; his scientific inductions
seemed to tell him of a world of invisible beings, capable of
influencing him for good or ill. From the scientific exercise of
his faculties he evolved the all-encompassing generalizations of
invisible and all-powerful causes back of the phenomena of
nature. These generalizations, early developed and seemingly
supported by the observations of countless generations, came to
be among the most firmly established scientific inductions of our
primeval ancestor. They obtained a hold upon the mentality of our
race that led subsequent generations to think of them, sometimes
to speak of them, as "innate" ideas. The observations upon which
they were based are now, for the most part, susceptible of other
interpretations; but the old interpretations have precedent and
prejudice back of them, and they represent ideas that are more