Patrick was preaching'. There were, of course, racial and national problems in Boyle's time, but they had not then presented themselves before the tribunal of the public mind as matters demanding investigation and treatment. RACE AND NATIONALITY IN RECENT YEARS We need not blame the statesmen and writers of Boyle's time for failing to recognize the inward significance of national and racial manifestations any more than we condemn his contemporary physicians for failing to separate from the mass of disease such conditions as are known to modern medical men as appendicitis and typhoid fever. Typhoid fever and appendicitis existed in Boyle's time just as did national disturbances and racial antipathies, but their nature and significance passed undiagnosed. It was not until England had laid siege, by means of armies of colonists, to lands inhabited by native races, or had come to guide the destinies of great tropical empires by handfuls of civil servants, that she realized that racial contact gives rise to live and burning antagonisms. Nor are national problems new to England; they have always dogged the footsteps of her statesmen. In Boyle's time a people could make its national spirit heard and felt only by resorting to brute force. In our times there are other means; a people mobilizes its national spirit by means of the daily press; the promulgation of national propaganda has become a fine art; modern statesmen have learned that national feelings, rightly directed, have the force of an avalanche. The problems of Race and of Nationality, then, are by no means new, but in their modern form they are new. The far-flung lines of the British Empire and the mobilization of the popular spirit by means of the press and propaganda have compelled our statesmen, historians, publicists, psychologists, and anthropologists to re-examine the nature of the forces which lie behind racial movements and national agitations. Of the importance of a right understanding of the nature of these forces for the future maintenance and development of the British Empire there cannot be any question. In the guiding of its destinies Oxford men will, in the future as in the past, take a leading part, and much of their success will depend on how far they have grasped the nature of the inward forces which group mankind into races and nations. That is my reason for making the problems of Race and Nationality the subject of this lecture in memory of Robert Boyle. INHERITED INSTINCTS AND MODERN IDEALS ARE OUT OF HARMONY