Nietzsche pointed out further that everything which makes for the preservation of the human race is diametrically opposed to the Christian ideal. Thus Christianity becomes the foe of science. The one argues that man should sit still and let God reign; the other that man should battle against the tortures which fate inflicts upon him, and try to overcome them and grow strong. Thus all science is unchristian, because, in the last analysis, the whole purpose and effort of science is to arm man against loss of energy and death, and thus make him self-reliant and unmindful of any duty of propitiating the deity. That this antagonism between Christianity and the search, for truth really exists has been shown in a practical way time and again. Since the beginning of the Christian era the church has been the bitter and tireless enemy of all science, and this enmity has been due to the fact that every member of the priest class has realized that the more a man learned the more he came to depend upon his own efforts, and the less he was given to asking help from above. In the ages of faith men prayed to the saints when they were ill. Today they send for a doctor. In the ages of faith battles were begun with supplications, and it was often possible to witness the ridiculous spectacle of both sides praying to the same God. Today every sane person knows that the victory goes to the wisest generals and largest battalions. Nietzsche thus showed, first, that Christianity (and all other ethical systems having self-sacrifice as their basis) tended to oppose the law of natural selection and so made the race weaker; and secondly, that the majority of men, consciously or unconsciously, were aware of this, and so made no effort to be absolute Christians. If Christianity were to become universal, he said, and every man in the world were to follow Christ's precepts to the letter in all the relations of daily life, the race would die out in a generation. This being true--and it may be observed in passing that no one has ever successfully controverted it--there follows the converse: that the human race had best abandon the idea of self-sacrifice altogether and submit itself to the law of natural selection. If this is done, says Nietzsche, the result will be a race of supermen--of proud, strong dionysians--of men who will say "yes" to the world and will be ideally capable of meeting the conditions under which life must exist on earth.