All four theories assume evolution as a fact. That the neck of the giraffe, for example, has been evolved to reach the leaves of high trees is admitted by all of them; they only differ in the principle underlying this evolution. According to teleology, the faculty to evolve a long neck has been infused into the protoplasm by the creative power, according to a prearranged plan. Creative evolution assumes a blind primordial vital impetus without purpose, end or aim. Organic life is an infinite addition, a continuance without conclusion. Creation, once started, the long neck has evolved without any previously arranged plan. The Neo-Lamarckian explains the evolvement of the long neck by the continual stretching of the organ to reach the leaves of high trees. The increase in length was then transmitted from generation to generation, each generation contributing its quota. In this way the present long neck has been evolved. The Neo-Darwinian assumes an accidental variation. At one time in the animal’s history an animal with a long neck has been accidentally bred. This variation with its higher survival value survived during a scarcity of food, while the low-necked varieties disappeared. Neither of the four theories gives entire satisfaction to the fastidious critic. The mechanistic theory denies or rather ignores the presence of an intelligence in the universe, and the human mind, as now constituted, can not understand how the power, that could create a substance with the potentiality to develop into the human intellect, could itself be devoid of intellect. If, on the other hand, the creative power is endowed with intelligence, then its working without aim or purpose is equally unthinkable. The vitalistic theory offers other difficulties. Teleology, for instance, does not answer the question why an intelligence, unlimited by space and time, omnipotent and omniscient, should need the vast machinery of evolution to accomplish its end; why could it not create a full-fledged Adam of the theologist? Moreover, the human mind can not grasp the How, Whence and the Where of the Supreme Intelligence, except by faith, and science has no dealing with faith. The same objection may be raised against creative evolution, whence this initial, vital impetus, whence this original life?