al geography and transportation technology. Until the end of nineteenth century, sea power was the supreme, but by then, railroads were making it possible to move large armies quickly over vast land areas. Mackinder wanted his government, which had achieved glory as a sea power, to be prepared for the rise of a land power, obviously Germany at that time. In his famous "heartland theory", he renamed Euro-Asia, "the world island" and the "pivot area", "the heartland".
             Who rules East Europe commands the Heartland; Who rules the Heartland commands the world island; Who rules the world island commands the world.
             According to his simple strategic argument, what must be prevented is German expansionism in Eastern Europe and a German alliance with the Soviet Union for the time. In spite of his effort, his idea had a little impact on British foreign policy. The reason is said that his way of interpreting human history is too simplistic and far geographically deterministic, and he failed to aware of the emergence
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