Geopolitics

Geopolitics is the study of how Earth's geography influences politics and international relations. It examines how physical factors shape the way countries interact with one another. Researchers use this field to understand, explain, and predict political behavior through geographical variables. These variables include area studies, climate, and topography, which refers to the shape of the land. They also look at demography, which is the study of populations, and the availability of natural resources. By studying these elements, experts can analyze how political power is linked to specific geographic spaces. This includes land territory, territorial waters, and the wealth found in natural resources.

One major way to study geopolitics is through the lens of sea power. Alfred Thayer Mahan, an American thinker from 1840 to 1914, argued that national greatness is tied to the sea. He believed the ocean was vital for both peaceful commerce and military control during war. Mahan proposed six specific conditions required for a nation to achieve sea power. First, a nation needs an advantageous geographical position. Second, it needs serviceable coastlines, abundant natural resources, and a favorable climate. Third, it needs an extent of territory that is large enough. Fourth, it requires a population large enough to defend that territory. Fifth, the society must have an aptitude for the sea and commerce. Finally, the government must have the inclination to dominate the sea.

Mahan also focused on the strategic importance of the Central Zone of Asia. This region lies between 30° and 40° north latitude and stretches from Asia Minor to Japan. During his time, independent countries like Turkey, Persia, Afghanistan, China, and Japan survived in this zone. Mahan viewed these nations as being caught between two larger powers: Britain and Russia. He considered Russia to be the greater threat due to its massive transcontinental size. He believed Russia's position was strategically favorable for expanding southward. To counter this, he argued that Anglo-Saxon sea power must resist Russian expansion.

Other theorists focused on how large landmasses and coastal regions interact. Nicholas J. Spykman was a follower and critic of both Mahan and Halford Mackinder. Spykman expanded existing theories to include the unity of the air alongside the sea and world politics. He used specific terms to divide the world into different zones. These included the Heartland, the Rimland, and the Offshore Islands and Continents. The Rimland is an intermediate region that lies between the Heartland and the marginal sea powers. Spykman argued that the Rimland separates the Heartland from ports that remain ice-free during winter. He famously claimed, "Who controls the rimland rules Eurasia. Who rules Eurasia controls the destinies of the world."

Spykman's ideas had a lasting impact on how nations manage global balance. His theories influenced the concept of containment, which involves limiting the expansion of a power. He suggested that the United States should support states in the Rimland to balance against Heartland powers like Russia. This perspective was shared by other thinkers like Homer Lea. In 1912, Lea argued that the Anglo-Saxon race faced threats from the expansion of Germany, Russia, and Japan. He believed these powers formed a dangerous coalition. Later, Edmund Walsh established the School of Foreign Service at Georgetown University in 1919. Walsh worked to create a uniquely American approach to studying international relations.

In the modern era, geopolitical ideas remain central to foreign policy. Former U.S. national security advisors Henry Kissinger and Zbigniew Brzezinski both focused on the importance of Eurasia. Even after the Cold War ended, Kissinger argued that Russia remained a major factor. He noted that Russia sits in the territory known as the geopolitical heartland. Kissinger believed the United States must maintain a global balance of power regarding Russia. He also expressed concern about the strength of Germany. He argued that Europe and America must work together to manage the power of Germany and Russia. Without this involvement, he feared the U.S. could become an isolated island off the coast of Eurasia.

Zbigniew Brzezinski further developed these ideas in his work, "The Grand Chessboard." He viewed Eurasia as a massive continent where the struggle for global primacy continues. Brzezinski argued that American foreign policy must create a stable equilibrium in Eurasia. He believed the United States should act as a political arbiter to prevent any single power from dominating the continent. He noted that Eurasia's combined power and resources vastly overshadow those of the United States. By maintaining influence in this "chessboard," the U.S. aims to prevent the unification of Eurasia under one dominant power. This helps ensure that no single nation can outstrip the U.S. economically or militarily.