In earlier cognate discussions, men like Captain Mahan have emphasized the importance of eastward and westward movements in the temperate zone, while others of Benjamin Kidd's school have insisted no less strongly upon the importance of the Tropics and the consequent north and south line of industrial life. A score of years ago nearly, Professor Reinsch, in his "World Politics," startled many American readers by his insistence upon the importance of the undeveloped and unoccupied tropical regions of the globe, mainly in South America and Africa. Even more insistently Kidd's "Control of the Tropics" had, two years before, magnified the same zone, but more particularly the densely peopled tracts with their varied possibilities of production and exploitation. In a recent article by J. A. R. Marriott, M.P., entitled "Welt-Politik," General Smuts of Africa is thus quoted: "Formerly we did not fully appreciate the Tropics as in the economy of civilization. It is only quite recently that people have come to realize that without an abundance of raw material which the Tropics alone can supply, the highly developed industries of today would be impossible. Vegetable and mineral oils, cotton, sisal, rubber, jute and similar products in vast quantities are essential for the industrial world."[12] Another aspect of tropical Africa is brought out in an article by Herr Emil Zimmerman, writing in the _Europäische Staats und Wirtschaft Zeitung_ of June 23, 1917: "If the Great War makes Central Africa German, fifty years hence 500,000 and more Germans can be living there by the side of 50,000,000 blacks. Then there may be an army of 1,000,000 men in German Africa, and the colony will have its own war navy, like Brazil. An England that is strong in Africa dominates the situation in Southern Europe and does not heed us. But from Central Africa we shall dominate the English connections with South Africa, India and Australia, and we shall force English policy to reckon with us."[13] And again Dr. Solf, the German Secretary for Colonies, has lately proposed a simple solution of Africa's industrial future. "In redividing Africa those nations which have proved most humane toward the natives must be favored. Germany has always considered that to colonize meant doing mission work. That is why in the present War the natives of our colonies stick to us. England's colonial history, on the other hand, is nothing but a list of dark crimes."[14] The principle enunciated in the first sentence of this statement is as important and true as the later ones are incorrect, if the present writer's inquiries and observations in British and German East Africa in 1912 are indicative of the facts in the case.