This special issue discusses, in-depth, the embedded conundrum of South-South and triangular cooperation (SSTC) whose frontiers are shifted from collaboration to contention within the United Nations (UN) development system and beyond. This introductory article provides the conceptual framework—the contentioncollaboration spectrum—that guides all the contributors and serves as the collective starting point for this project. The moving frontiers of SSTC reflect the shifting historic relationships between the global South and North as well as Southern partner countries. The framework enables the six articles of this special issue to investigate the paradoxical structure of contrasting dynamics of SSTC, which has always been exposed to historical transformations at multi-levels of analysis: global governance, regional engagements, middle power perspectives, and the UN development system and beyond.

The Japanese and Australian governments supported the establishment of the International Commission on Nuclear Non-proliferation and Disarmament (ICNND) in 2008. During its two-year mandate, the ICNND organized international conferences in Sydney, Washington, Moscow, and Hiroshima. The commission made specific proposals in a final report entitled Eliminating Nuclear Threats: A Practical Agenda for Global Policy Makers. This research note examines the significance of the report, while paying special attention to its limitations. In particular, this study criticizes the nuclear policies of Japan and Australia that have depended upon U.S. extended nuclear deterrence and peaceful use of atomic energy. Finally, it suggests five alternatives for Japan and Australia so that both countries can resume further endeavors towards a world free of nuclear threats.