Return of the Heartland: Why Halford Mackinder’s vision still defines the struggle for Eurasia

More than a century after the Great War, the spectre of Mackinder’s ‘Heartland Theory’ continues to haunt the world’s geopolitics.

Sir Halford Mackinder

Each November 11, Europe falls silent for two minutes to mark the end of the First World War in 1918. The Armistice that ended the Great War was met with exhausted relief, but also with great illusions, namely that mankind had fought “the war to end war.”

Until 2014 (the centenary of the start of the Great War), it is estimated that more than 25,000 volumes and articles on the First World War had been published since 1918.  

Yet amid this voluminous scholarship, the one Englishman who looked beyond the trenches and the carnage and saw a deeper pattern was Sir Halford Mackinder, the remarkable Oxford geographer whose theories transformed how nations viewed the world, even as the victors of the Great War were redrawing frontiers in Paris and creating a League of Nations to secure peace.

In his now-classic ‘Democratic Ideals and Reality,’ published after the Armistice in 1919, Mackinder had presciently cautioned that unless the peacemakers understood how geography shaped power, their peace settlement would collapse.

Map detailing the Heartland theory

Mackinder (1861–1947) was no pacifist. A Conservative MP and imperialist, he believed that Britain’s maritime supremacy depended on its ability to check rising continental powers. A decade before the outbreak of the First World War, Mackinder had risen rose before the Royal Geographical Society (in January 1904) to deliver his iconic lecture titled ‘The Geographical Pivot of History.’

That lecture introduced Mackinder’s famous ‘Heartland theory’ - that the vast expanse of land stretching from the Volga to the Yangtze, from the Himalayas to the Arctic, was the true pivot of world power. Mackinder argued that for centuries, control of this region had been constrained by geography - its steppes, deserts and frozen plains. But the vast network of railways was changing that. The age of sea power, as epitomised by Britain’s Royal Navy, was giving way to an age of land empires linked by steel and oil.

Mackinder warned that if one power mastered this Heartland, it could mobilise vast resources, expand across the “World-Island” (Eurasia plus Africa) and ultimately challenge the maritime nations.

Following Armistice in 1919, with Germany defeated and Russia in the turmoil of the Bolshevik coup and the subsequent Civil War, Mackinder’s warning seemed remote. Yet, he insisted that peace could endure only if the victors preserved a balance between land and sea power, a blend of democratic ideals and geopolitical realism.

The world did not listen. At Versailles, Woodrow Wilson’s moral idealism triumphed over geopolitical caution. Within two decades, Mackinder’s prophecy had been grotesquely reinterpreted after a German geographer and war veteran named Karl Haushofer, who had studied Mackinder’s Heartland maps, turned them into a blueprint for ‘revenge.’

A postcard showing the Eastern Front in WW1.

He envisioned a Berlin–Moscow–Tokyo axis linking continental powers against the Anglo-American ‘sea empire.’ Haushofer’s pupil, Rudolf Hess, carried these ideas to Adolf Hitler in prison after the failed putsch of 1923. By 1939, the unthinkable Nazi–Soviet Pact - a geopolitical ‘alliance of land powers’ that Mackinder had dreaded – became a reality and divided Eastern Europe between two totalitarian states.

Mackinder, then in his seventies, was horrified. But his stock rose once again during the Second World War. In 1942, ‘Democratic Ideals and Reality’ was republished and his opinions much sought after.

Mackinder’s strategic map for the post-war order saw a transatlantic alliance anchoring Western Europe with Britain as a “moated aerodrome” and North America as the industrial and demographic reserve. To the east, he foresaw the Soviet Union emerging as “the greatest land power on the globe.”

The Cold War had not yet begun, but Mackinder’s mental map had already delineated its front lines.

In Washington, his ideas found new disciples, notably in American diplomat George F. Kennan famous ‘Long Telegram’ and “X” article which laid the foundations for America’s containment strategy against Joseph Stalin’s increasingly aggressive Soviet Union.

The Cold War saw Mackinder’s Heartland mutate into the Soviet ‘sphere of influence’ as the struggle between sea and land powers became the organising myth of the Cold War.

NATO’s creation in 1949 gave institutional form to what Mackinder had glimpsed in 1919 - a “single community of nations” spanning the North Atlantic. The Truman Doctrine, announced six days after Mackinder’s death in 1947, became an unintended memorial to his fusion of democratic ideals and strategic realism.

Throughout his works, Mackinder was always gazing at something more fundamental than just borders or battles.

Mackinder’s axiom, neatly encapsulated as - “Who rules East Europe commands the Heartland; Who rules the Heartland commands the World-Island; Who rules the World-Island commands the world” - would become the intellectual scaffolding for a century of geopolitical thinking.

For him, geography was not just a backdrop to history but its very engine. He viewed the rise and fall of empires through the prism of terrain. The steppes that unleashed the Huns and Mongols upon Europe; the mountain ranges that hemmed in Persia and India; the navigable rivers that made Europe’s fragmented powers dynamic. For Mackinder’s, the fall of Rome was not a tragedy of decadence but a failure of geography wherein a complacent maritime empire was overwhelmed by land-borne nomads surging from Eurasia’s heart.

The First World War, in his view, was yet another chapter in this grand continental struggle. While most saw it as a clash of alliances, Mackinder saw geography’s logic asserting itself once again. The Central Powers occupied the Eurasian Heartland, straddling the railways and plains that gave access to both East and West. The British and their allies, maritime powers by instinct, struggled to contain this land-based juggernaut. When the Allies finally prevailed in 1918, it was not, to Mackinder, a final triumph of ‘liberal democracy’ but merely a pause in the eternal contest between land and sea, between the Heartland and the Rimlands.

Mackinder’s insight was not lost on the strategists who followed. In the aftermath of Versailles, he warned that if Germany and Russia ever united, the ‘Heartland’ would be unassailable. That fear would haunt British and American policymakers throughout the 20th century. During the Cold War, the Soviet Union’s control over much of Eastern Europe and Central Asia seemed to confirm Mackinder’s prophecy.

American strategist Nicholas Spykman later inverted Mackinder’s dictum, arguing that the ‘Rimland’ - the maritime fringes of Eurasia - was where the balance of power could be preserved. This became the basis of America’s strategy of containment, from NATO’s creation to the wars in Korea and Vietnam.

Since his death, Mackinder has been resurrected by several geopolitical thinkers for a new age.  Robert D. Kaplan, in his ‘Revenge of Geography’ (2012), described how geography was once again asserting itself. China’s expansion into the South China Sea, Russia’s invasion of Ukraine and America’s anxieties about the Arctic all seem to echo Mackinder’s worldview.

Indeed, today’s conflicts across Eurasia unfold as if choreographed by his ghost. When Vladimir Putin’s tanks rolled into Ukraine in 2022, many observers saw a brutal power grab; others saw a modern echo of the same logic that animated Tsarist expansion a century ago. For Russia, as Mackinder foresaw, control over Eastern Europe remains the key to securing its Heartland. Meanwhile, China’s Belt and Road Initiative with its sprawling network of land routes and sea ports stretching across Central Asia to Europe can be read as a methodical effort to integrate and dominate the very “World-Island” Mackinder once described.

For all its prescience, Mackinder’s theory was also a product of its time. Critics have long accused him of reducing history to geography, of ignoring ideology, economics and human will. But even they concede that his framework offers a rare manner of seeing how space and strategy intertwine.

To study Mackinder today is to be reminded that geography does not determine destiny but sets the boundaries within which that destiny unfolds.