Eurasia

Lore & Background

Eurasia is the largest continental area on Earth, comprising all of Europe and Asia, and is physiographically considered a single supercontinent in some models. Its borders with Africa are at the Suez Canal, and the two are sometimes combined as Afro-Eurasia. The landmass spans from Iceland and the Iberian Peninsula in the west to the Russian Far East, and from the Russian Far North to Maritime Southeast Asia in the south. It is bordered by the Atlantic, Arctic, and Pacific Oceans, and the Indo-Mediterranean. The division between Europe and Asia is a historical social construct, as neither fits the usual continental definition. Eurasia covers about 36.2% of Earth’s total land area and holds over 5 billion people, approximately 70% of the human population. Humans first settled there from Africa 125,000 years ago. The continent includes many peninsulas, such as the Arabian, Korean, Indian, Anatolia, Kamchatka, and Italian. Due to its vast size and latitudinal range, Eurasia exhibits all climate types under the Köppen classification, from extreme heat to extreme cold and varying precipitation. It has hosted many ancient civilizations, including those in Mesopotamia, Egypt, the Indus Valley, and China. A continuous belt of civilizations stretched through the Eurasian subtropical zone from the Atlantic to the Pacific during the Axial Age, forming the mainstream of world history for two millennia. All 100 of the highest mountains on Earth are in Eurasia, located in ranges such as the Himalaya, Karakoram, Hindu Kush, Pamir, and Tian Shan. The Alpide belt stretches across southern Eurasia from Java to the Iberian Peninsula. Major rivers and large islands, including Borneo, Sumatra, Honshu, and Great Britain, are defining features.

Reader's Guide

Eurasia's significance lies in its role as the primary stage for human civilization and geopolitical power. It hosted ancient civilizations in Mesopotamia, Egypt, the Indus Valley, and China, and its Axial Age belt of civilizations stretched from the Atlantic to the Pacific. Geopolitically, Eurasia is considered critical: a power that dominates it would control two of the world's three most advanced regions and about 75% of the world's people and known energy resources. Regional organizations such as the Eurasian Economic Union and the Commonwealth of Independent States seek to promote integration across the landmass.

Did You Know?

• Eurasia covers around 36.2% of Earth's total land area.
• The five most-populated islands in the world are Java, Honshu, Great Britain, Luzon, and Sumatra, all in Eurasia.

Vastness and Physical Diversity

Eurasia stretches from the Icelandic shores and the Iberian Peninsula in the west all the way to the Russian Far East, and from the Arctic reaches of the Russian Far North down to Maritime Southeast Asia. Covering roughly 55 million square kilometres—about 36.2 percent of all land on the planet—it shelters more than five billion people, roughly 70 percent of humanity. Because of its enormous span in latitude, the landmass displays every climate category in the Köppen system, from the most extreme cold to the most punishing heat, with correspondingly varied precipitation patterns and ecosystems. Its coastline is studded with major peninsulas such as the Arabian, Korean, Indian, Anatolian, Kamchatka, and Italian. The island landscape is equally impressive: Borneo, Sumatra, Honshu, Great Britain, Sulawesi, Java, and Luzon rank among the largest, while Java, Honshu, Great Britain, Luzon, and Sumatra hold the five most populous island populations on Earth. In the Arctic, Severny Island and Nordaustlandet stand as the largest uninhabited landmasses, while Kotelny Island and Spitsbergen are among the least densely settled.

Cradle of Civilizations and Shifting Connections

Human beings first stepped into Eurasia from Africa roughly 125,000 years ago, and over the millennia the landmass became the cradle of some of the earliest great civilizations—Mesopotamia, Egypt, the Indus Valley, and China. During the Axial Age, spanning the mid-first millennium BCE, a continuous belt of cultures stretched across the Eurasian subtropical zone from the Atlantic to the Pacific, and this corridor remained the mainstream of world history for roughly two thousand years. New threads of connection were woven in later eras: Iberian mariners broke open new sea routes in the 1490s, and the 1869 completion of the Suez Canal opened a direct passage through the Indo-Mediterranean. That same waterway linked to the wave of Western European New Imperialism that dominated Africa and Asia until the mid-twentieth century. In the second half of the twentieth century, the communist bloc, driven primarily by the Soviet Union, shaped much of the continent's political landscape until the Cold War ended in 1991.

Geological Origins and Tectonic Boundaries

Geologically, Eurasia is often treated as a single rigid mega-block, though this view remains debated among earth scientists. The landmass took shape between 375 and 325 million years ago when the ancient landmasses of Siberia, Kazakhstania, and Baltica merged, and Baltica was in turn joined to Laurentia—the core of what would become North America—to form the larger continent of Euramerica. In modern plate tectonics, the Eurasian Plate encompasses Europe and most of Asia, yet it deliberately excludes the Indian subcontinent, the Arabian Peninsula, and the stretch of the Russian Far East lying east of the Chersky Range. Whether one counts Eurasia as one continent, part of the larger Afro-Eurasia supercontinent, or simply the biggest of the six, five, or four recognized continents depends on the model in use. The division between Europe and Asia, after all, is a historical and cultural construct rather than a clean geological break, and neither half fits the usual definition of a continent on its own.

The Geopolitical Heart of the World

Long before it became a formal geopolitical term, Eurasia was simply the largest continental landmass on the planet. Yet the word carries enormous strategic weight in modern political thought. Halford Mackinder's commentaries placed the continent at the center of global power dynamics, and Zbigniew Brzezinski later argued that how the United States manages Eurasia is critical to world order. A power dominating the landmass would command two of the world's three most economically productive regions, and control over it would almost automatically bring Africa into subordination, leaving the Western Hemisphere and Oceania geopolitically peripheral. Roughly 75 percent of the world's population lives in Eurasia, and the continent holds about three-fourths of known energy resources, both in surface enterprises and beneath the soil. Russian Eurasianism, a distinct ideological tradition, further underscores how the very name has become a lens through which competing powers interpret their own strategic interests on the planet's central stage.