they are situated in the primitive organization of the human brain. Let me cite only one witness on this point--one who would willingly believe, if he could, that racial antagonisms are both superficial and acquired. "That a very real problem exists in the race-consciousness of the white and coloured peoples is evident, is sometimes painfully evident, sometimes dangerously so. There is nothing to be gained by under-estimating its deep-seated nature and the gravity of its issues." This is a quotation from the presidential address given by Dr. W. Flint to the last meeting (1919) of the South African Association for the Advancement of Science. The mixture of races in South Africa has roused to activity instincts or subconscious states which lie dormant in members of a uniform population. National and racial frontiers, we shall see, are part of Nature's evolutionary machinery. Meantime we merely note that modern industrial ideals clash with the working of Nature's instinctive mechanisms, and in South Africa the two are in actual collision. SOME OF THE NATIONAL AND RACIAL PROBLEMS OF EUROPE As we pass northwards along the African continent, over a welter of tribal peoples, we need merely note the cry for national recognition which ascends to us from the lower valley of the Nile. The descendants of the ancient Egyptians, mixed with a conglomeration of racial stocks drawn from Africa, Asia, and Europe, are agitating for 'national' independence and isolation. It would take us too far afield to consider the national and racial problems of the 300 millions of diverse peoples of India who are linked together by only one bond--the government extended to them by the British Empire. Nor need we stay now to speculate on the nationalities which will arise from the wreckage of Turkey, Austria, or Russia, nor shall we dally with the Balkan jumble of nationalities. We simply note that these instincts or feelings which compel men of like speech, habits, and traditions to group themselves into independent national units are most active and powerful where racial or national boundaries are most confused. ARE THE JEWS A SEPARATE RACE?