Inhibition, therefore, is the organic foundation on which Morality builds, not only that Morality which consists in abstention from certain actions, but that which is manifested in active virtue. But inhibition is a faculty which the organism has developed for its own ends, the better and more easily to preserve its own life, and to render its power of achievement greater. Morality makes use of this faculty, which it finds ready to hand, for the ends of the community, and very often against the immediate interests of the individual for whose advantage it is nevertheless intended. Now the individual would not put up with this inexpedient use, one is tempted to say this clever misuse, of one of its organic capacities, if this yielding up of the mechanism of inhibition to Morality were not beneficial to life and therefore came within the sphere of the biological purpose of inhibition. By being grafted on a pre-existent organic faculty Morality becomes such itself; it forms a link in the chain of biological processes within the individual organism; it ceases to be purely a product of society forced upon the individual to his molestation and in spite of his annoyance; it acquires the character of a differentiation of inhibition in order to help the individual, or even to make it at all possible for him to adapt himself to life in a society. That under the present conditions obtaining on our planet the human individual can only live in society demands no proof. And as he can only live in society if he submits to its rules of good and bad, Morality, which urges him to this submission, aids and even preserves his life. We shall now show that inhibition, of which Morality is a differentiation making it easier for the individual to adapt himself to the conditions of social life, is of the greatest value to the individual from the biological point of view. The lowest forms of life it is possible for us to observe show nothing which can be interpreted as inhibition. All external influences to which they are not indifferent invariably produce the same effects. They respond to every stimulus with a reflex action which reveals nothing that we should be justified in describing as an activity of the will. The reaction follows with strictly automatic regularity upon the stimulus, and nothing intervenes between the two which would permit the conclusion that in the simple organism there is any faculty that could delay, modify or change the reaction to the external stimulus.