The _third_ agency, which has been very much broadened in its activities in recent years, I may designate as the social agency. It recognizes implicitly at least, if not consciously, that mental disease at any rate the kind of mental disease included in the second group, the so-called “insane” is a disorder of the individual as a member of the social group and that it manifests itself largely by disturbances of his relation to his fellows, and therefore it becomes a legitimate therapeutic endeavor to attempt a readjustment of these relationships. To this end the social agency has been developed in many directions. In the first place, we have amusements. The simpler amusements may be called, speaking from the point of view of the patient, the passive variety,—the type of amusement that is brought to the patient, such as theatrical performances, moving pictures, and the like, whereas the second type of amusement, which is more advanced and more valuable, is the type in which the patient himself takes part, such for example as theatrical performances in which he is a performer, musical programs, in which he plays or sings. Then there is the group which is not after all very widely separated from the amusement group and yet is somewhat different, and that is the group which we might term athletic activities and which demand upon the part of the patient some initiative. These range all the way from the simplest activities, which are imitative in nature, such as calisthenics under the instruction of the athletic director, to mass games, where a large group of patients are all engaged together in a common purpose, such as push ball, to games of contest requiring not only initiative but a relatively high degree of efficiency, such as the tug-of-war and the various types of races and stunts, boxing and wrestling, and which are from time to time advantageously staged on a field day and receive the added stimulus of an audience. In addition to such activities as the above there are also many minor ones of a similar nature, the principle of which, however, is the same,—the social give-and-take of patient between ward and ward, the instruction in such things as folk-dances, and the like.