What Are Small Island Developing States (SIDS)? A Security Policy Framework
Small Island Developing States (SIDS) are 39 nations and territories recognized by the United Nations as sharing four structural conditions: geographic isolation from major markets and emergency infrastructure, small territorial and economic scale that limits institutional capacity, limited natural resources and high import dependency, and high vulnerability to external shocks including natural disasters, climate change, and global economic disruptions. Together, SIDS represent approximately 600 million people across the Pacific, Caribbean, Atlantic, Indian Ocean, and Mediterranean.
The official UN definition and recognition
The United Nations formally recognized SIDS as a distinct development category at the 1992 Earth Summit, with the first International Conference on SIDS held in Barbados in 1994. The current governing framework is the Antigua and Barbuda Agenda for SIDS (ABAS), adopted at the Fourth International Conference on SIDS in May 2024, which sets ten ambitious economic, social, climate, and environmental outcomes for SIDS sustainable development over the next decade.
The three SIDS groupings by region are the Pacific SIDS (fourteen nations including Fiji, Samoa, Tonga, Vanuatu, Solomon Islands, Papua New Guinea, and the Federated States of Micronesia); the Caribbean SIDS (twenty nations and territories including Jamaica, Trinidad and Tobago, Barbados, and the Eastern Caribbean states); and the AIMS group — Atlantic, Indian Ocean, Mediterranean, and South China Sea — including Maldives, Seychelles, Mauritius, Cabo Verde, and São Tomé and Príncipe.
Why SIDS require a distinct security policy framework
Continental security policy frameworks — FEMA emergency management, DHS border security, NATO collective defense — were designed for large territorial states with geographic redundancy, substantial institutional capacity, and access to regional mutual aid. SIDS have none of these by definition. Their security vulnerabilities are structural: a single port closure stops all supply; a single road failure isolates a community; a single bilateral security agreement can fundamentally alter a nation's strategic posture because there is no alternative treaty architecture to fall back on.
ISPI is the world's only nonprofit research institution dedicated exclusively to public safety and security policy for SIDS communities. Every ISPI research paper applies a SIDS global bridge — connecting Hawaii and Pacific island research findings to the broader 39-nation SIDS community, and vice versa, because the structural conditions that make island security different from continental security are shared across all SIDS regardless of ocean basin.
The Samoa Pathway and the Antigua and Barbuda Agenda
The Samoa Pathway (2014) and the Antigua and Barbuda Agenda for SIDS (2024) are the two primary UN multilateral frameworks governing SIDS development priorities. Both identify disaster risk reduction, maritime security, climate resilience, and governance capacity as priority areas. Both acknowledge that SIDS face structural conditions that standard development and security frameworks do not adequately address.
ISPI's research documents the specific policy mechanisms through which those multilateral commitments translate into practitioner-level institutional investments — the 30-day supply reserve standard that addresses supply chain singularity, the island-specific emergency management framework that addresses the FEMA mismatch, and the governance capacity framework that addresses the bilateral security agreement vulnerability that the Solomon Islands-China security deal made visible in 2022.
SIDS security in 2026: the current landscape
The Pacific SIDS security environment in 2026 is the most complex since decolonization. China's ballistic missile test near Tuvalu on July 6, 2026 — landing in waters the Pacific Islands Forum has long designated as an Ocean of Peace — combined with Australia's rapid bilateral security agreement signing with five Pacific island nations in 24 months, has placed every Pacific SIDS government in the middle of active great-power competition for the first time since World War II. Tuvalu is simultaneously navigating an existential climate threat, a security agreement that limits its bilateral options, and a missile test in its surrounding waters — all as a nation of 11,000 people across nine coral atolls with no independent military capacity.
The 39 SIDS nations collectively represent one of the most governance-diverse security communities in the world — from Hawaii's U.S. state government with full federal emergency management access to Tuvalu's atoll nation with eleven thousand residents and no standing military. Every ISPI research finding applies a SIDS global bridge because the structural conditions driving island security vulnerability are shared. The specific institutional responses vary by SIDS context. The analytical framework is universal.