The New Global Order: How Strategic Competition Between the United States and China is Reshaping International Institutions and Middle Powers

Abstract

Purpose– The international system is undergoing one of its most significant transformations since the end of the Cold War, driven by intensifying strategic competition between the United States and the People’s Republic of China. This study examines how this rivalry is reshaping international institutions and redefining the strategic autonomy of middle powers, with particular attention to their responses within an increasingly fragmented global order. Design/methodology/approach– This study employs a qualitative research design based on document analysis and comparative case studies. It integrates the theoretical perspectives of Offensive Realism, Institutional Liberalism, and Power Transition Theory to explain changes in global governance and the evolving strategic behavior of middle powers. The analysis draws upon scholarly literature, policy documents, and reports from international institutions published between 2018 and 2026. Findings– The findings indicate that the contemporary international order is evolving toward a fragmented yet interconnected multipolar system characterized by institutional competition, selective cooperation, technological rivalry, and flexible diplomatic alignments. Rather than functioning solely as neutral governance mechanisms, international institutions have increasingly become arenas for geopolitical contestation between major powers. The study further demonstrates that middle powers are expanding their strategic autonomy through hedging strategies, issue-based coalitions, and diversified partnerships rather than exclusive alliance commitments. Meanwhile, China is simultaneously challenging existing liberal institutions while adapting to them through complementary initiatives such as the Asian Infrastructure Investment Bank (AIIB), the Belt and Road Initiative (BRI), the Shanghai Cooperation Organisation (SCO), and an expanded BRICS framework. Research implications/limitations– This study is limited to qualitative analysis based on documentary sources and selected case studies. Future research may incorporate quantitative institutional analysis or longitudinal empirical studies to evaluate the long-term effectiveness of middle-power strategies across different regional contexts. Originality/value – This study contributes to international relations scholarship by integrating three major theoretical perspectives to explain the simultaneous transformation of global institutions and middle-power diplomacy. It argues that the emerging international order is defined neither by renewed American unipolarity nor Chinese hegemony, but by competitive coexistence within an increasingly multipolar system requiring substantial institutional adaptation to sustain global governance.