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Grand strategy, Burden sharing, Foreign and defense policy, International security, Israel-Hamas, Israel-Iran, Middle East, and Ukraine-Russia

Christopher McCallion

Fellow

Christopher McCallion is a fellow at Defense Priorities.

McCallion focuses on issues in grand strategy, IR theory, U.S. foreign policy, and technological competition. His work has appeared in POLITICO, Newsweek, The National Interest, and CNN among others. He was formerly an adjunct lecturer in political science at Hunter College, City University of New York, and holds an MSc in Theory and History of International Relations from the London School of Economics and Political Science.

ExplainerDeterrence, Grand strategy

Grand strategy: Deterrence

By Christopher McCallion

October 3, 2025

Key points Deterrence is the mobilization of coercive means to convince an adversary not to take an aggressive action. This […]

op-edIsrael‑Hamas, Israel, Middle East

Trump’s Gaza peace plan won’t end the war

By Christopher McCallion

September 30, 2025

op-edUkraine‑Russia, Europe and Eurasia, Russia, Ukraine

Trump should walk away from Ukraine before it’s too late

By Christopher McCallion

August 19, 2025

More from Christopher McCallion

ExplainerDeterrence, Grand strategy

Grand strategy: Deterrence

By Christopher McCallion

October 3, 2025

op-edIsrael‑Hamas, Israel, Middle East

Trump’s Gaza peace plan won’t end the war

By Christopher McCallion

September 30, 2025

op-edUkraine‑Russia, Europe and Eurasia, Russia, Ukraine

Trump should walk away from Ukraine before it’s too late

By Christopher McCallion

August 19, 2025

ExplainerAmericas, Air power, Counterterrorism

No GWOT-Narco

By Daniel DePetris and Christopher McCallion

July 2, 2025

op-edIsrael‑Iran, Iran, Israel, Middle East

America cannot afford a forever war in Iran

By Christopher McCallion

June 19, 2025

op-edMiddle East, Iran, Israel‑Hamas, Yemen

Trump needs to stop involving himself in Middle East drama

By Christopher McCallion

May 29, 2025

Christopher McCallion Past Virtual Events

virtualMiddle East, Basing and force posture, Diplomacy, Houthis, Iran, Iraq, Israel, Israel‑Hamas, Military analysis, Syria

Past Virtual Event: Trump in the Middle East: Impacts, implications, and alternatives

May 16, 2025
virtualUkraine‑Russia, Air power, Diplomacy, Drones, Europe and Eurasia, Land power, Military analysis, Russia, Ukraine

Past Virtual Event: Ukraine’s critical choice: Pursue peace or fight on

April 16, 2025
virtualUkraine‑Russia, Europe and Eurasia, Russia, Ukraine

Past Virtual Event: Trump and Ukraine: Prolonging or ending the war

December 13, 2024
virtualNATO, Alliances, Europe and Eurasia, Russia, Ukraine, Ukraine‑Russia

Past Virtual Event: A ‘bridge’ to NATO or false hope for Ukraine?

July 12, 2024
virtualNATO, Europe and Eurasia, Russia, Ukraine

Past Virtual Event: Reexamining the U.S. role in European security

May 3, 2024
virtualAsia, China, Grand strategy, Taiwan

Past Virtual Event: Are semiconductors a reason to defend Taiwan?

November 17, 2022

Christopher McCallion Featured Symposia

symposiumNATO, Alliances

Antique alliance: Rethinking NATO at 75

July 2, 2024

symposiumGrand strategy

Realistic recommendations for Trump II

January 13, 2025