[U] It is perhaps of interest to note in passing that war-time opinion and prejudice are characteristically pro-national and anti-national, rather than anti-hostile and pro-hostile respectively. The impulse that might have led an isolated German to defend the English at the expense of his countrymen, or an isolated Englishman to defend the Germans at the expense of his countrymen, was in its psychological essence anti-national and animated by no love of the enemy; it was an instinctive revolt against his country, or rather the groups which in the process of social segregation had come to represent it. Such terms, therefore, as pro-German, and in another association pro-Boer, though doubtless convenient implements of abuse, were inexactly descriptive psychologically. “Anti-English” would have been more just, but immensely less effective, as vituperation, for the prejudice it was desired to decry was for the most part a hostility not to the nation, but to its official embodiment. Probably, however, it was the very element of injustice in the term pro-German that made it so satisfactory a vehicle for exasperated feeling. Finally, one who attempts to deal usefully with matters in which strong feeling is inevitable will do well, however thoroughly he may try to guard himself from the effects of prejudice, to bring his speculative conclusions into such form that they are automatically tested by the progress of events. Symmetry and internal consistency are unfortunately but too often accepted as evidences of objective validity. That the items of a series of conclusions fit into one another neatly and compose a system logically sound and attractive to the intellect gives us practically no information of their truth. For this a frequently repeated contact with external reality is necessary, and of such contacts the most thoroughly satisfactory one is the power to foretell the course of events. Foresight is the supreme {223} test of scientific validity, and the more a line of argument is liable to deflection by non-rational processes the more urgent is the need for it constantly to be put into forms which will allow its capacity for foresight to be tested. This was the one great advantage amongst heavy handicaps enjoyed by those who ventured into speculation upon the international situation during the late war. Events were moving so quickly from crisis to crisis that it was possible for the psychologist to see his judgments confirmed or corrected almost from day to day, to see in the authentic fabric of reality as it left the loom where he had had any kind of foreknowledge, where he had been altogether unprepared, and where he had failed in foresight of some development that should have been within his powers.