In the latest stages of man's development, conscious regard for law and custom, the fear of gods, the explicit recognition of duty and conscience, and the direct pursuit of ideals-all the reflective considerations that we may lump together under the word "conscientiousness"-play their ever increasing part and complicate the psychological situation. But even in modern civilized man the underlying animal forces count for far more. And without them the later self-conscious forces would not have come into play at all. There is a small class of people who are dominated throughout their activities by consciously present ideals or obedience to religious injunctions. But the average man still acts mainly under the pressure of the more primitive forces which we have enumerated. How far has the moralizing process been blind and how far conscious? (1) To a very large extent the moralizing process has been a merely mechanical one. Through slight differences in nerve-structure individuals have varied a little in their response to the pressure of inward cravings and outward perils. The braver, the more prudent, the more industrious have had a better chance of survival. So by the process which we have come to call natural selection there has been a continual weeding-out of the relatively lazy, cowardly, reckless, and imprudent. Much of our morality is the result of tendencies thus long cultivated by the ruthless methods of nature; we inherit a complex nervous organization, the outcome of ages of molding and selection, which now instinctively and easily responds to stimuli with a certain degree of inbred morality. This is the case much more than is apparent upon the surface. The child seems very unmoral, the mere prey of passing impulses; but latent in his brain are many aptitudes and tendencies which will at the proper time ripen and manifest themselves. The period of adolescence is that during which the changes in mental structure which were effected during the later stages of evolution are being made in the mind of this new individual; he reenacts, as it were, in a few years, the history of the race, and emerges without any conscious effort, the possessor of the fruits of that long struggle of which he was always the heir.