Edgar Rice Burroughs,
Out of Time's Abyss — Chapter II
(1918)
“ Could it be that such grotesque beings represented the high culture of the human race within the boundaries of Caspak? Had natural selection produced during the countless ages of Caspakian life a winged monstrosity that represented the earthly pinnacle of man’s evolution?Bradley had noted something of the obvious indications of a gradual evolution from ape to spearman as exemplified by the several overlapping races of Alalus, club-men and hatchet-men that formed the connecting links between the two extremes with which he, had come in contact. ”
