We should counteract the baneful influences of the pathogenic, pestiferous, mental microbes which now infest our social air, since the child, not having yet formed the antitoxin of critical judgment and knowledge of evil, has not the power of resisting mental infection, and is thus very susceptible to mental contagion on account of his extreme suggestibility. The cultivation of credulity, the absence of critical judgment and of recognition of evil, with consequent increase of suggestibility, make man an easy prey to all kinds of social delusions, mental epidemics, religious crazes, financial manias, and political plagues, which have been the baleful pest of aggregate humanity in all ages. The immunization of children, the development of resistance to mental germs whether moral, immoral or religious, can only be effected by the medical man with a psychological and psychopathological training. Just as science, philosophy and art have gradually passed out of the control of the priest, so now we find that the control of mental and moral life is gradually passing away from under the influence of the church into the hands of the medical psychopathologist. The physical life of the nation is now gradually being regulated by medical science with a consequent decrease of disease and mortality. Gradually and slowly the school begins to feel the need of medical advice, both as to the health of the pupils and their more efficient training. Gradually the medical man assumes the responsibility of guiding the teacher and telling him why the pupils are defective in their studies and why the pedantic methods of academic pedagogy are arid and sterile. In some cases the doctor actually undertakes the training of the young. Thus the Italian doctor, Maria Montessori, from the education of defective children has finally undertaken, with immense, almost phenomenal, success, the training and education of normal children. As we look forward into the future we begin to see that the school is coming under the control of the medical man. The medical man free from superstitions and prejudices, possessed of the science of mind and body, is to assume in the future the supervision of the education of the nation.