Climate change is now widely recognised as a critical—and potentially irreversible—threat to peace, security, and sustainable development. As environmental stressors intensify, placing growing strain on political, social, and economic systems, their impacts on fragility, migration, and conflict are becoming increasingly visible. In response, climate change is being more frequently framed through a security lens, particularly within debates at the intersection of humanitarian action, development, and peace.
Calls to integrate climate security considerations into peacebuilding and development agendas are gaining traction in high-level policy spaces. Recent COP discussions, building on earlier efforts to align humanitarian action with climate risk planning, have emphasised the need for earlier and more coordinated responses to climate-related risks. UNDP’s Climate Security Mechanism has highlighted the importance of climate-conflict analysis in fragile contexts, while research institutions such as SIPRI have underscored the value of climate-informed early warning and conflict prevention to support stability.
Climate security also carries significant geopolitical implications. Understanding these dynamics is particularly important in regions already affected by governance deficits and environmental stress. Where climate-related pressures—such as water scarcity, land degradation, and extreme weather—interact with existing socio-political vulnerabilities, risks of displacement and violence are compounded. In fragile and conflict-affected settings, including parts of the Sahel and the Horn of Africa, climate-driven changes are exacerbating inter-communal tensions by undermining agriculture, livelihoods, and access to natural resources. These dynamics directly challenge peacebuilding efforts and strain already limited governance capacity.
International organisations have increasingly drawn attention to the role of climate change in shaping migration and displacement. The International Organization for Migration and the Intergovernmental Panel on Climate Change have both underscored how climate-induced mobility functions not only as a symptom of vulnerability, but also as a driver of further instability. Small Island Developing States have repeatedly highlighted the existential risks posed by sea-level rise and extreme weather, framing adaptation and loss and damage as matters of climate justice that require collective international action. At the same time, organisations working on disaster displacement have argued for stronger protection frameworks for populations displaced by climate-related shocks.
National security actors have also played a growing role in shaping climate security narratives. In recent years, several NATO member states have begun integrating climate risk assessments into defence planning, reflecting a broader recognition of climate change as a systemic risk to national and regional stability. At the multilateral level, the UN Security Council has debated whether and how climate change constitutes a direct threat to international peace and security. A growing number of member states have called for climate data and analysis to inform conflict prevention and peacekeeping mandates, although consensus on this approach remains uneven.
Not all actors agree, however, that the climate crisis should be addressed primarily through a security lens. Some argue that framing climate change as a security threat may elevate political attention and urgency. Others caution that securitisation risks legitimising militarised responses to challenges that are fundamentally rooted in development, governance, and inequality. As highlighted in recent climate security dialogues, rights-based and community-centred approaches are widely seen as essential to avoiding unintended harm to human dignity and social cohesion. Regional bodies have similarly warned that top-down security approaches may marginalise local voices and undermine trust.
Viewed more holistically, climate security is less about creating a new policy silo and more about rethinking how governance systems respond to compound and intersecting risks. This includes strengthening institutional capacity, promoting inclusive governance, and ensuring that responses to climate stress do not exacerbate grievances or exclusion. Investments in adaptive social protection, sustainable natural resource management, and locally led resilience initiatives are critical. Evidence from conflict-affected settings suggests that approaches combining traditional knowledge with scientific expertise, and grounding action in local realities, are often more durable and effective than externally driven interventions.
Approaching climate security as a strategic governance challenge also requires anticipating climate risks, managing trade-offs over scarce resources, strengthening institutions, and embedding foresight into national planning and security strategies. Existing international frameworks—such as the Sendai Framework, the Paris Agreement, and the Santiago Network—offer important entry points, but practical integration across policy domains remains limited.
Moving forward, several priorities stand out:
Effectively addressing the climate–security nexus ultimately requires overcoming entrenched sectoral silos. Greater coherence between humanitarian, development, and peace actors is essential, as is evidence-based policymaking informed by interdisciplinary research and local knowledge. Climate-related security risks are not distant or abstract—they are already shaping political stability and human security in tangible ways. Addressing them requires approaches that are both realistic and principled. By combining attention to risk with a commitment to justice, inclusion, and local agency, it is possible to strengthen resilience and preserve the conditions for peace.