American Hegemony Under Strain: Multipolarity, Revisionism, and the New Architecture of Global Governance The unipolar moment that followed the dissolution of the Soviet Union in 1991 heralded a phase of American preeminence in global politics. Francis Fukuyama's “end of history” thesis epitomized the optimism that liberal democracy and free-market capitalism, under American stewardship, would define … Continue reading Critically analyze the multidimensional challenges to American hegemony in the post-Soviet international order, with particular attention to the diffusion of power through rising multipolarity, the assertiveness of revisionist states such as China and Russia, the erosion of normative legitimacy in U.S.-led institutions, and the growing influence of non-state actors, transnational networks, and regional coalitions in redefining global governance.