Seven kinds of man are to be found in every community, seven different points of view with regard to health administration. Each individual, likewise, may have seven attitudes toward health laws, seven reasons for demanding health protection. These seven points of view, seven stages of development, are clearly marked in the evolution of sanitary administration throughout the civilized world. With few exceptions, it is possible, by examining ourselves, our friends, and our communities, to see where one motive begins and leaves off, giving way to or mixing with one or more other motives. A friend once asked me if I could keep this number seven from growing to eight or nine. Perhaps not. Perhaps there are more kinds of people, more health motives, more stages in health progress; but I am sure of these seven, and certain that they have been of great help to me in planning health crusades for the state of New Jersey and for New York City. The number seven was not reached hit-or-miss fashion, nor was it chosen for its biblical prestige. On the contrary, it came as the result of studying health administration in twoscore British and American cities, and of reading scores of books on sanitary evolution. Seven catchwords make it easy to remember the characteristics and the source of every motive, every kind of person, and every stage in the evolution of sanitary standards. These seven catchwords are: _Instinct_, _Display_, _Commerce_, _Anti-nuisance_, _Anti-slum_, _Pro-slum_, _Rights_. By the use of these catchwords any teacher, parent, public official, educator, or social worker should be able to size up the situation, the needs, and the opportunity of the individuals or the communities for whom a health crusade is planned.