Timeline of Major Geopolitical Events & Conflicts

The two and a half centuries after Westphalia saw the rise of the European nation-state, the expansion of colonial empires across Africa and Asia, and the emergence of the balance-of-power system that kept great-power war in check — until it didn't. The Opium Wars forced China open to Western commerce, the Scramble for Africa carved an entire continent into colonial possessions, and the Great Game between Britain and Russia laid the groundwork for conflicts that persist in Central and South Asia today. By 1914, the system's contradictions — imperial rivalry, alliance entanglements, nationalist fervour — would ignite the most destructive war the world had ever seen.

Between 1914 and 1945, two world wars killed over 100 million people, destroyed four empires, and fundamentally reordered global power. The First World War dismantled the Ottoman, Austro-Hungarian, Russian, and German empires, redrawing borders from the Balkans to the Middle East in ways that still generate conflict. The interwar period's failed diplomacy gave way to an even more catastrophic sequel. The Second World War ended with nuclear weapons, the United Nations, and a world divided between two superpowers — the architecture that would define the next half-century.

From 1947 to 1991, the United States and the Soviet Union waged an ideological, military, and economic contest that touched every continent. Nuclear deterrence prevented direct confrontation between the superpowers, but proxy wars in Korea, Vietnam, Afghanistan, and Central America killed millions. The Cold War also drove the space race, the arms race, and the creation of alliance systems — NATO and the Warsaw Pact — whose legacies shape European security to this day. It ended not with a war but with the Soviet Union's internal collapse, leaving the United States as the sole superpower.

The 1990s were defined by American hegemony and the expansion of the liberal international order. NATO enlarged eastward, the European Union deepened its integration, and globalisation accelerated. But the decade also revealed the limits of unipolarity: ethnic cleansing in the Balkans, genocide in Rwanda, and the Asian financial crisis exposed the gap between liberal aspirations and geopolitical reality. The period culminated on September 11, 2001, when a non-state actor demonstrated that even the world's sole superpower was vulnerable to asymmetric attack.

The September 11 attacks launched the United States into two decades of military engagement across the Middle East and Central Asia. The invasions of Afghanistan and Iraq, the rise and fall of the Islamic State, and the broader Global War on Terror consumed trillions of dollars and hundreds of thousands of lives. Meanwhile, China's economic rise accelerated, Russia reasserted itself in its near abroad, and the foundations of the unipolar order quietly eroded. By the end of the decade, the strategic landscape had shifted irreversibly.

Since 2011, the international system has entered a period of contested multipolarity. The Arab Spring upended the Middle East, Russia annexed Crimea in 2014 and launched a full-scale invasion of Ukraine in 2022, and China's Belt and Road Initiative projected power across Eurasia and Africa. Economic interdependence — once seen as a guarantor of peace — has been weaponised through sanctions, export controls, and technology bans. Gray-zone conflict, cyber operations, and information warfare have blurred the line between peace and war. The rules-based order is under strain, and no single power can enforce it alone.