For many years Dr. Wallin has been working in the field of mental hygiene. His contacts have been numerous and his point of view gives him a comprehensive outlook, so that he has been able to steer clear of the censorious attitudes and the overconfidence in his own methods that mar so many otherwise excellent treatises on mental hygiene or personality development. He recognizes that we are only at the beginning of study and understanding of the psychic and social life of modern man, though he is rather more hopeful than some of us for the immediate future of personality study and guidance.

Professor Wallin has set himself a huge task—“to canvass,” as he says in the preface, “all the significant kinds of faulty reaction types and to outline the important remedial, preventive, and preservative aspects of the mental hygiene program with respect to its physical, psychological, social, and educational factors.” At that, he tells us, it is obvious that