Great-power rivalry between the United States and China is dismantling the post-World War II international order, shifting the global landscape toward a highly contested and fragmented state of affairs. This transition threatens global political stability as hard power becomes more evenly distributed and domestic nationalisms undermine multilateral institutions.
Historically, global orders have been rare anomalies, existing only when a single power or coalition possessed overwhelming dominance to enforce its will. During the Cold War, NATO and the Warsaw Pact controlled over 80 percent of global GDP, whereas today the two leading superpowers command less than half. Power is now diffused. Consequently, the rules-based system, including the Nuclear Non-Proliferation Treaty of 1967, fails to constrain major actors in theaters like the South China Sea. As politics increasingly override economic integration, the international community is drifting back to a historical norm of persistent, uncentered regional disorder.