SOCIAL INERTIA. If the acquisition of bad, that is, disserviceable habits, is disastrous to the individual, it is in some respects even worse in the group. The inertia of the nervous system, the tendency to go on repeating connections that have once been made is one of the strongest obstacles to change, however desirable. It is not only that habits of action have been established, but that with them go deep-seated habits of thought and feeling. The repression of people's accustomed ways of doing things may bring with it a sense of frustration almost as complete and painful as if these obstructed activities were instinctive. This is not true merely in the melodramatic instances of drug addicts and drunkards. It is true in the case of social habits which have become established in a large group. Any Utopian that dreams of revolutionizing society overnight fails to take into account the enormous control of habits over groups which have acquired them, and the powerful emotions, amounting sometimes to passion, which are aroused by their frustration. THE IMPORTANCE OF THE LEARNING HABIT. That habit is at once the conserver and the petrifier of society has long been recognized by social philosophers. There is one habit, however, the acquisition of which is itself a preventive of the complete domination of the individual or the group by hard and fast routine. This is the habit of learning, which is necessary to the acquisition of any habits at all. Man in learning new habits, "learns to learn." This ability to learn is, of course, correlated with a plasticity of brain and nerve fiber which is most present in early youth. The disappearance of this capacity is hastened by the pressure which forces individuals in their business and professional life to cling fast to certain habits which are prized and rewarded by the group. A sedulous cultivation on the part of the individual of the habit of open-minded inquiry, of the habit of learning, and the encouragement of this tendency by the group are the only antidotes that can be provided against this marked physiological tendency to fossilization and the frequent social tendencies in the same direction. Whether habits shall master us, or whether we shall be their masters, depends also on the method by which they were acquired. If they were learned merely through mechanical drill, they will be fixed and rigid. If they were learned deliberately to meet new situations, they will not be retained when the conditions they were acquired to meet are utterly changed.