Geopolitics and Empire: The Legacy of Halford Mackinder by Gerry Kearns is a deep exploration of the profound impact Halford Mackinder’s geopolitical theories have had on world politics, imperialism, and global strategy. Mackinder, one of the founding fathers of geopolitics, is most famous for his Heartland Theory, which argued that control over the vast landmass of Eurasia—referred to as the Heartland—was key to securing global dominance. His central idea, encapsulated in his famous dictum, "Who rules East Europe commands the Heartland; Who rules the Heartland commands the World-Island; Who rules the World-Island commands the world," serves as the backbone of this book's analysis.
Kearns delves into Mackinder's belief that geography is destiny and shows how Mackinder’s theories shaped the strategies of the British Empire, Nazi Germany, the United States, and the Soviet Union. In the early 20th century, British imperial policymakers drew from Mackinder’s strategic vision to justify the control of key territories in Africa, India, and the Middle East—areas Mackinder saw as crucial to Britain’s ability to maintain global dominance. Mackinder’s idea of imperial geography framed these regions as buffers and gateways to the Heartland, where controlling territory was essential for safeguarding British sea power against rising land-based powers like Russia and Germany.
Mackinder’s influence extended beyond the British Empire. His theories were later embraced by Nazi geopoliticians, particularly Karl Haushofer, who adapted the Heartland Theory into the Nazi concept of Lebensraum, or living space. Haushofer believed that by controlling Eastern Europe and the Heartland, Nazi Germany could secure the resources and territory needed for global supremacy. This application of Mackinder’s ideas played a significant role in the Nazi’s expansionist ambitions during World War II.
Kearns also examines how Mackinder’s theories re-emerged during the Cold War. The United States adopted a geopolitical strategy heavily influenced by Mackinder’s warning against a Eurasian power dominating the Heartland. This led to the policy of containment, where the U.S. and its allies sought to prevent the spread of Soviet influence, particularly in Eastern Europe and Central Asia, regions Mackinder identified as pivotal for global control. In this context, Mackinder’s Heartland Theory served as a blueprint for U.S. foreign policy to this day.
In addition to tracing the historical influence of Mackinder’s ideas, Kearns offers a critique of the imperialist and militaristic assumptions underlying Mackinder’s geopolitics. The book contrasts Mackinder’s conservative, militaristic view of world politics with Progressive Geopolitics, an approach that emphasizes international cooperation, multilateralism, and peace. Kearns argues that while Mackinder’s ideas provided intellectual justification for empire-building and the use of force in international relations, the world now requires a new geopolitical framework rooted in law, diplomacy, and ethical engagement.
Another critical aspect of the book is how it shows the continuing relevance of Mackinder’s theories in modern geopolitics. In the 21st century, Mackinder’s ideas about the strategic importance of Eurasia are still reflected in the foreign policies of both the United States and Russia. U.S. interventions in Iraq and Afghanistan, as well as Russia’s military actions in Ukraine and Central Asia, can be understood through the lens of Mackinder’s Heartland Theory. The Mackinder Forum and the London School of Economics Mackinder Centre for Long Wave Events continue to study his ideas, reinforcing the ongoing influence of his geopolitical framework on global strategy.
By linking Mackinder’s ideas to current geopolitical issues, Kearns makes a compelling case for the enduring power of Mackinder’s vision of global control through territorial domination. The book illustrates how Mackinder’s geographical determinism—the idea that geography determines the fate of nations—remains relevant, especially in discussions around energy politics, resource control, and global military strategy.
For readers interested in understanding the origins of modern geopolitical thought, the imperial legacies of the British Empire, and the ways in which Mackinder’s ideas continue to shape contemporary global power struggles, Geopolitics and Empire: The Legacy of Halford Mackinder is an essential read. It combines historical analysis with a critical examination of the ethical implications of Mackinder’s legacy, offering a comprehensive view of how geography, strategy, and imperialism intersect in global politics.
