Doreen Horschig

Fellow, Project on Nuclear Issues
Doreen Horschig

Doreen Horschig is a fellow with the Project on Nuclear Issues at the Center for Strategic and International Studies (CSIS). She is also a non-resident research associate at the School of Politics, Security, and International Affairs at the University of Central Florida (UCF). Previously, Doreen was a nuclear security policy fellow at the American Academy of Arts and Sciences and a Stanton nuclear security fellow at the Massachusetts Institute of Technology. Her research examines proliferation, nonproliferation, and counterproliferation, as well as nuclear norms contestation and public opinion on nuclear issues. Doreen’s works has been published in Third World Quarterly, Journal of Global Security Studies, Foreign Affairs, War on the Rocks, Lawfare, and others. She holds a PhD in security studies from UCF, an MA in international relations from New York University, and a BA in international studies from Manhattan College.

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What Factors Drive U.S.-Israeli Differences on Iran’s Nuclear Challenge?

U.S.-Israeli differences over the Iranian nuclear challenge are growing. With Washington signaling interests in diplomacy and Israel advocating for military action, their diverging strategies could affect strategic alignment and coordination.

Critical Questions by Doreen Horschig and Bailey Schiff — April 4, 2025

Audio Briefs

What Factors Drive U.S.-Israeli Differences on Iran’s Nuclear Challenge?

An audio version of “What Factors Drive U.S.-Israeli Differences on Iran’s Nuclear Challenge?,” a new Critical Questions by CSIS's Doreen Horschig and Bailey Schiff. This audio was generated with text-to-speech by Eleven Labs.

Podcast Episode by Doreen Horschig and Bailey Schiff — April 4, 2025

Audio Briefs

Can France and the United Kingdom Replace the U.S. Nuclear Umbrella?

As doubts grow over U.S. nuclear commitments, Germany’s new chancellor has sparked debate on whether France and the United Kingdom could provide a European nuclear umbrella. But with strategic and doctrinal hurdles ahead, is Europe ready to reshape its nuclear deterrence?

Critical Questions by Astrid Chevreuil and Doreen Horschig — March 4, 2025

On the Horizon Vol. 7

The 2024 PONI Nuclear Scholars explore shifts in states’ nuclear arsenals and strategies, the effects of the Ukraine war on nuclear dynamics, and the transformative power of emerging tech on nuclear decisionmaking, offering fresh insights and innovative solutions.

Report by Doreen Horschig — December 19, 2024

Reviving Chemical Weapons Accountability in a Multipolar World

Next week's 29th Session of the Conference of States Parties of the Organization for the Prohibition of Chemical Weapons is an opportunity to revitalize accountability and global cooperation in an age of impunity.

Commentary by Natasha Hall and Doreen Horschig — November 21, 2024

Why Striking Iranian Nuclear Facilities Is a Bad Idea

Israeli military strikes on Iran’s nuclear facilities could escalate tensions and push Tehran further towards nuclear weapons development. Diplomacy, although slow, remains the only viable way to curb Iran’s nuclear ambitions.

Commentary by Doreen Horschig — October 25, 2024

How Are Cyberattacks Fueling North Korea’s Nuclear Ambitions?

Last week, the United States and others accused a North Korean hacker group of global cyber espionage supporting North Korea's nuclear weapons program. Coordinated efforts among the U.S. government, allies, and the private sector are essential to combat this threat.

Critical Questions by Doreen Horschig — July 31, 2024

Audio Briefs

How Are Cyberattacks Fueling North Korea’s Nuclear Ambitions?

An audio version of “How Are Cyberattacks Fueling North Korea’s Nuclear Ambitions?,” a new Critical Questions by CSIS’s Doreen Horschig. This audio was generated with text-to-speech by Eleven Labs. 

Podcast Episode by Doreen Horschig — July 31, 2024

Audio Briefs

House of Cards?

While the norms against nuclear proliferation, use, and testing are widely supported and critical for stability, they are increasingly contested. The fragile interconnectedness of the norms urges global action to reinforce these pillars and prevent a destabilizing cascade.

Report by Heather Williams and Doreen Horschig — July 18, 2024