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Event Summary: Nexus25 2025 UN Climate Week Roundtable
On September 24, 2025, the Nexus25 team convened a private roundtable discussion at this year’s NY Climate Week, focusing on how climate change, food security, and conflict are reshaping human mobility globally. Experts spanning multiple UN agencies, humanitarian organizations, private sector companies, research institutions, and more came together to discuss:
- How national authorities can properly mobilize domestic resources and engage in long-term planning across the climate mobility continuum;
- How policymakers can minimize the impact of divisive rhetoric surrounding migration and human mobility – and galvanize support for anticipatory action that helps people safely move or stay;
- Which upstream interventions are most effective in building partner capacity to handle internal displacement; and
- What new alliances and strategies at the multilateral level are required to manage increased human mobility.
A summary of the Nexus25 side event “Human Mobility At the Nexus of Climate, Food, and Conflict” can be found here.
For more information on the project, please reach out to CCS’ Nexus25 staff (Erin Sikorsky and Siena Cicarelli), or contact the full team at info@nexus25.org.
Book Event: Climate Change on the Battlefield: International Military Responses to the Climate Crisis
Join the Council on Strategic Risks on November 5 from 9:30-10:30 am ET for a conversation about Center for Climate and Security (CCS) Director Erin Sikorsky’s new book, Climate Change on the Battlefield, which offers a comparative look at how militaries around the world are responding to climate change. Through rich international case studies, she dissects how rising temperatures and extreme weather degrade military readiness, shape existing threats, and create new ones. Some militaries are simply layering climate risk into existing doctrine, while a few are reimagining their core missions in light of climate change. Whether these responses adequately match the challenge is, in her view, a critical question for the future of global security.
This virtual, public event will feature opening remarks from CSR Executive Vice President Mallory Stewart, former US Assistant Secretary of State for Arms Control, Deterrence and Stability, and a fireside chat between Erin and Converging Risks Lab (CRL) Director Caroline Baxter, former US Deputy Assistant Secretary of Defense for Force Education and Training.
For more about Erin’s book, click here.
Event Summary: CCS-Nexus25-ETTG Policy Conference: EU-Africa Relations in Transition
The Nexus25 project, a transatlantic effort led by the Istituto Affari Internazionali and Center for Climate and Security, hosted its first annual conference in Rome on October 29th, 2024. This invite-only conference, organized in collaboration with The European Think Tanks Group, centered on enhancing EU-African partnerships from the lens of mitigation, adaptation, and the energy transition.
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The Story Behind Climate Security and What it Means for US Foreign Policy
This piece is cross-posted on New Security Beat, the Blog of the Wilson Center’s Environmental Change and Security program.
By Noah Fritzhand and Angus Soderberg
Hurricanes Helene and Milton battered the southeastern US in September and October and caused a combined estimate of $300 billion in damages. These storms were only the latest example of a cascade of disasters that is expected to worsen as climate change intensifies. Yet the impacts do not stop at dollars and human lives. Threats to security and stability also will multiply as rising temperatures increase the variability of rainfall patterns and the intensity of storms.
A recent event co-hosted by the Wilson Center with the Center for Climate and Security examined the underlying dynamics of climate security and their implications for US foreign policy. Peter Schwartzstein, Wilson Center Global Fellow and environmental Journalist in Residence at the Center for Climate and Security, who was among the speakers at the event, observed that “climate change’s most debilitating and greatest impact on violence is when it is acting on other drivers of instability.”
Climate change can exacerbate regional instability by altering the availability of life-sustaining resources such as water, food, and land. And US officials are discovering that the sheer scope of climate stress can challenge US interests as well. Assistant Secretary for the Bureau of Conflict and Stabilization at the US Department of State (DoS) Anne Witkowsky noted that close to “3.6 billion people [are] living in regions susceptible to climate change, [and] more than 1 billion of those people living in regions experiencing conflict.”
Communities around the world are facing climate stressors that threaten their lives and livelihoods, compound conflict risks, and challenge the ability of governments to provide services for their citizens. Recognizing that climate change is no longer just a future threat, countries and multilateral institutions now have taken a new interest in understanding the interactions between climate, conflict, and security.
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