One of the most striking characteristics of the development of science in me last twenty odd years has been the growing awareness among scientists themselves of what the verbaily daring call interdisciplinary co-operation. This is a rather barbarous phrase to indicate the fact that the older academically defined delineation of knowledge into scientific subjects or university departments is now more of a hindrance to understanding knowledge and teaching than it is a help. Perhaps the phiase also indicates something of a revolt against the dangers of ever-increasing specialization. At any rate, it does mean, from the more positive angle, that today research and teaching in any one subject are being cross-fertilized by new insights and points of view borrowed from or suggested by other workers in other related fields —a sort of lend-lease in the field of ideas, if you will. Thus medicine is becoming more psychology conscious and a new field of study, that of Psychosomatic medicine, is holding out ever-increasing possibilities for the understanding of disease symptoms, in a similar fashion, sociology is drawing more and more on the hunches of social psychologists, psychiatrists and anthropologists for both the raw materials and the concepts with which and from which a more powerful science of human relations may one day be built.