Reimagining East Asian multilateral cooperation in economy and security: an analysis of South Korea’s proposals in the 1960s

Abstract South Korea’s unrealized proposals in the 1960s remind us that the tension between bilateral dominance and fragile regionalism remains one of the central dilemmas of Asia’s order today. Yet scholarship has largely overlooked South Korea’s Cold War multilateral initiatives. This article investigates Seoul’s efforts to reshape regional economic and security arrangements amid escalating Cold War tensions, focusing on proposals for the Asian Common Market, the Asian and Pacific Council, and the Asia–Pacific Treaty Organization. Using archival documents, presidential speeches, and declassified U.S. records, and interpreted through a constructivist and a historical context lens, the analysis shows how South Korea sought to reframe its identity from a peripheral Cold War state to a regional leader by advocating economic integration and multilateral security. These proposals encountered significant resistance, especially from the United States and Japan, underscoring the limits of middle-power diplomacy in Cold War Asia. The article demonstrates that these unrealized initiatives not only highlight the constraints of U.S.-led bilateralism but also illuminate enduring tensions that continue to shape Asia’s regional order in the Indo-Pacific today.