Democratic Ideals and Reality

Halford Mackinder's work, particularly in Democratic Ideals and Reality (1919), introduced the concept of the "heartland." This refers to a vast region of Eurasia, the control of which Mackinder posited as key to global domination. He argued that controlling this landmass, inaccessible by sea, would provide self-sufficiency and a strong defensive position.12

Mackinder's theory suggested that dominance over the heartland, achieved through control of Eastern Europe, would ultimately lead to world power. This contrasted with earlier maritime theories of power. While the advent of air power has been seen by some as diminishing the relevance of his land-based theory, Mackinder believed it remained significant. His ideas influenced geopolitical thought, particularly in Germany and later in discussions concerning the Soviet Union's potential expansion.12