9¢ THE SHADOW OF THE WORLD’S FUTURE which tend inevitably toward war. Intrinsically they are of a character which involves this. And one sees that Tagore is right when he says that “knowledge and efficiency are powerful in their outward effect, but they are the servants of Man, not Man himself” (op. ctt., P. 41). From what has been said it is evident that the problems directly connected with the world’s future in respect of its population are of fundamental importance. A world-survey to obtain the data for their real solution has not yet been made. As already indicated, it is indispensable. Countries which, like Australia, Africa, South America, and parts of Russia in Asia, are under-populated, have essentially the deepest interest therein. Countries which have an overplus of people are also greatly interested. Con- centration on these matters may save the world much trouble, for the issues cannot be avoided. The losses that will eventuate from armed collisions in future are likely to be more appalling than heretofore. Over- concentration on the various questions of the moment to the detriment of the possibility of reaching satis- factory world-conclusions as to the future of mankind is, we submit, supreme folly, and the danger is that it will be paid for terribly. Over-population is, of course, a relative term, not an absolute one. Advances of scientific and technical knowledge will continually open up new possibilities of population, though relatively these will become con- tinually less. But, as things are, many countries find themselves already greatly over-populated, and must perforce very soon see to the remedy. Many countries in Europe are already in difficulty. However much— for example—the conzadini of Italy or the peasants of Germany and of many other parts of Europe may be helped by a better knowledge of agriculture, such countries are now actually under the pressure of a