Pedagogical anthropology, like all the other branches of anthropology, studies man from the naturalistic point of view; but, unlike general anthropology, it does not concern itself with the philosophic problems related to it, such, for instance, as the origin of man, the theories of monism or polygenism, of emigration, and classification according to race; problems which, as everyone knows, are difficult of solution, and which constitute the pivot on which biological anthropology revolves. Thus, for example, bacteriology has its origin in biology, in so far as it has certain orders of living organisms for the subject of its research; but it well nigh ignores the problems of biological philosophy associated with them, such as the origin of living matter and of the primitive cell; the fixity or variability of monocellular species; the possibility of life in the isolated nucleus (the microbe), or in the isolated protoplasm (the monera), but it devotes itself to the direct study of microscopic organisms, both in themselves alone and in their influence upon their environment; in short, bacteriology has for its purpose the acquirement of that practical knowledge necessary for a successful campaign against the causes of infective maladies, and for rendering infected districts sanitary. In much the same way, pedagogical anthropology, considered as a form of study, departs from general anthropology. It studies man from two different points of view: his development (ontogenesis), and his variations.

Since many causes concur in producing variations in the individual during his development (social causes, pathological causes, etc.), we have to take into consideration, and frequently invoke the aid of subsidiary sciences (sociology, pathology, hygiene). Variations constitute the most important subject of inquiry in pedagogic anthropology, just as fixed characteristics constitute the essential matter of research in general anthropology: because the latter endeavours, by the help of fixed characteristics, to trace back to the origin of species, while the former tries, through the help of variable characteristics, to discover a way for the future perfectionment of the human species and the individual: indeed, this is precisely what constitutes the practical purpose of its application to pedagogy.

In comparison with criminal and medical anthropology, pedagogic anthropology differs substantially in its declared intentions. These other two kindred branches endeavour to diagnose the personality of the individual; we must admit that both psychiatry and general medical practice profit by the application of anthropology to the extent of securing greater accuracy in diagnosis and prognosis; but whenever the study of a patient's personality sheds light upon decisions of this sort, it generally follows that the personality is fixed and unalterable. For instance, when, in medical practice an individual constitution is shown to be fatally predisposed to certain definite diseases, that is precisely one of the cases where medical treatment is most impotent; and the same may be said when, in the practice of criminal law we find a defendant whose personality is profoundly degenerate. It follows that the application of these new anthropological methods is substantially diagnostic; furthermore, they are limited to special classes of human beings, to those who are physiologically the most impoverished, such as criminals and the diseased. Pedagogic anthropology, on the contrary, embraces all humanity; but it pays special attention to that part of it which is psychologically superior: the normal human being. Its purpose is none the less diagnostic; but it regards diagnosis as constituting a means, and not merely indicating an end; because the end projected by pedagogic anthropology is a far-reaching and rational system of hygiene.

More than that, the proposed system is the one true one, a hygiene that pays more attention to the man himself than to his environment; striving to perfect him in his physiological functions, or to correct any tendency to abnormal and pathological deviations.

It follows that, in pedagogic anthropology, the direction taken by the naturalistic study of man is predominantly physiological.

In the same manner as the other two kindred branches of anthropology, this branch which has joined forces with pedagogy has severed connection with the original parent stock of general anthropology, and abandoned its dogmatisms and to a large extent its phraseology.

Criminal anthropology, for example, shows great daring and scant accuracy in its affirmations and its researches; and to a large extent it has acquired a nomenclature of its own; and medical anthropology lays down laws that general anthropology never took into consideration, and neglects to bestow particular attention upon the head, which formed the object of fundamental research in general anthropology.

In the same way, pedagogic anthropology has had to emancipate itself from the general science from which it has sprung, in order to proceed unhampered along the practical line of research, which consists essentially in a study of the pupil and the compilation of biographic charts, from which a fund of material will result, destined to enrich the scientific content of this branch of learning.

But since the study of the pupil must not be morphological alone, but psychological as well, it is necessary for anthropology to invoke the aid of experimental psychology, in order to achieve its purpose. Now it is essential to psychology, no less than to pedagogic anthropology, to study the reactions of the physiological and psychical personality of the child in the environment which we call school. Consequently it is reserved for the teacher to make a large contribution to these two parallel sciences, which are coming to assume the highest social importance.

It follows further that pedagogic anthropology differs from the other two allied branches in its practical applications; the progress of criminal and medical anthropology requires, as a matter of fact, only the labors of medical specialists; in the case of pedagogic anthropology there is equally a need of medical specialists, to whom the diagnosis and the treatment of abnormal pupils must be entrusted, as well as the hygiene of their development; but in addition to these, the teachers also are summoned to a vast task of observation, which, by its continuity, will supplement and complete the periodic observations of the physician.