The international political system has been in continuous transformation since its inception. History records a shift in world order from multipolarity to bipolarity, onward to unipolarity, and again toward emerging multipolarity. This article revisits a research study that investigates the causes and consequences of these transitions and analyses the instability and uncertainty of polarity structures that generate insecurities in the anarchic international order. Using an explanatory approach and drawing on power transition theory, world‑systems analysis, neo‑realism and interdependence theory, the article defines world order and its types and traces how changes in the distribution of power trigger systemic transformation. Historical episodes from the World Wars and the Cold War to the post‑9/11 era and the COVID‑19 pandemic demonstrate that major transitions have been driven by conflicts and perceived exploitation in the distribution of power, thereby dissatisfying rising states. The article argues that the contemporary movement toward a complex form of multipolarity, shaped by the rivalry between the United States & China, Russia’s invasion of Ukraine, and growing regional coalitions in the Indo‑Pacific, intensifies systemic uncertainty, complicates collective security, and magnifies non‑traditional threats such as pandemics, cyberwarfare, and climate change.