The degree of success attained by any such attempt at readjustment on a large scale to changed standards and conditions, must to a very considerable extent depend upon the advance that is achieved by, and the application that is made of, the various branches of science dealing with the phenomena of human life in all its aspects. Biology, physiology, medicine, hygiene, economics, politics, law and education must all contribute their share to the solution of the great problem of reconstituting human society upon a satisfactory peace footing. Above all perhaps, it is to the science of the human mind that we should most naturally turn for enlightenment in dealing with many of the most important aspects of this problem.
[Sidenote: The present status of Psychology]
Unfortunately it so happens that Psychology is among the youngest of the sciences; its state of development, in comparison with that of many other disciplines, is as yet in no wise commensurate with the relative importance for human welfare of the problems with which it is concerned. Conscious of this disproportion between our present knowledge and the weight of the matters that are at stake in any application of psychological theory to practical affairs, many leading psychologists have preferred to postpone any attempt at such application until the more important results of recent research, many of which are still matter for controversy, shall have been firmly established upon a wider and more unassailable foundation.
[Sidenote: The application of Psychology to practical problems]
Perhaps as a consequence of this attitude (praiseworthy no doubt in itself), and of its effects--direct and indirect--upon psychological outlook and procedure, there exists at the present time a fairly widespread notion that Psychology is largely a matter of empty speculations or trivial technicalities, "a happy refuge for the lazy industry of pedants[2]," as a well known author has recently called it, with little or no bearing upon the larger problems of human life and conduct. It would appear, however, that the war--with its urgent call for immediate practical action--may have proved the means of inducing psychologists to adopt a less academic attitude in the pursuit of their science; of compelling them to carry out a stocktaking of the results already achieved with a view to ascertaining which, if any, are of a nature to throw light upon the actual problems of the time, and to work out in detail the application of psychological principles to these problems in all cases where such application promises to be of importance. Thus, immediately following upon the entrance of the United States into the war, the psychological resources of that country were mobilised by the American Psychological Association with a view to the immediate investigation of urgent questions affecting the conduct of the war. Under a central committee there were constituted no less than twelve subcommittees, each in charge of a special field and each acting under the chairmanship of a psychologist of special eminence in that field. Previous to this there had already been formed in this country a War Research Committee of the Psychological Subsection of the British Association to deal with problems of practical and theoretical importance connected with, or arising out of, the war. Assistance on a considerable scale in a variety of matters of direct military importance has also been rendered by several of the psychological laboratories attached to the Universities of the United Kingdom.