Terrorism & Violent Extremism

Just Security provides expert legal and policy analysis of terrorism, counterterrorism, and domestic and international violent extremism.

Highlights:

A police officer responds to a shooting at Evergreen High School on September 10, 2025 in Evergreen, Colorado. At least three students, including the suspected shooter, were injured in the attack. (Photo by Michael Ciaglo/Getty Images)

Correctly Assessing Left-Wing Terrorism and Political Violence in the United States

A recent published report risks feeding false narratives about political violence and polarization.
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The Just Security Podcast: Murder on the High Seas Part III

Tess Bridgeman is joined by Rebecca Ingber and Brian Finucane to assess the latest strikes, the brief detention of two survivors, where the campaign may be headed, and what…
Right-wing white nationalists hold flags with signs like "white pride worldwide."

A New Approach in the Fight Against Transnational Violent Extremism is Needed

If the U.S. and foreign partners could strategically deploy their counterterrorism programs to deliberately target a common enemy, all would mutually benefit.
Police maintain a presence outside a command center holding evacuated students following the lockdown of the school after a call of an active shooter on March 29, 2023 in Pittsburgh, Pennsylvania. Many schools, including Oakland Catholic and Pittsburgh Central Catholic, were targeted as part of what authorities are calling "computer-generated swatting calls." Many agencies, including state and municipal police, are conducting investigations. (Photo by Jeff Swensen/Getty Images)

Swatting Attacks and Nihilistic Violent Extremism: A Primer

Swatting attacks are sometimes dismissed as pranks or hoaxes. But they’ve wreaked havoc on college campuses this year and a network of extremists is behind many of them.

Collection: U.S. Lethal Strikes on Suspected Drug Traffickers

Collection of expert analysis on the legality of the U.S. strike on Venezuelan vessels in the Caribbean, the consequences of the strike, and related issues.

Assassinations in America: How Political Violence Became Personal

Americans can no longer turn to their political leadership to avert the catastrophe of political violence.
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2,221 Articles

Children, Young People and the Emerging Terrorism Threat Landscape

Prevention efforts must shift toward a model that addresses the systemic drivers and underlying causes of youth vulnerability to violent extremism.
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The Just Security Podcast: Misogyny’s Role in Violent Extremism

Cynthia Miller-Idriss joins Tom Joscelyn to discuss her new book, Man Up: The New Misogyny and the Rise of Violent Extremism.
Right-wing white nationalists hold flags with signs like "white pride worldwide."

How Misogyny Fuels Violent Extremism

Taking a closer look at where misogynist beliefs come from can help shed light on the pathways to violence — and how to interrupt them.

Book Release – Perpetual War and International Law: Enduring Legacies of the War on Terror

Introducing a new OUP book interrogating how precedents set in the post-9/11 era continue to shape contemporary conflicts.
Firefighters walk towards one of the tower at the World Trade Center before it collapsed after a plane hit the building September 11, 2001 in New York City. (Photo by Jose Jimenez/Primera Hora/Getty Images)
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The Just Security Podcast: Murder on the High Seas? What You Need to Know about the U.S. Strike on the Caribbean Vessel

Rebecca Ingber and Brian Finucane join Tess Bridgeman to unpack what you need to know about the U.S. strike on a purported drug trafficking vessel in the Caribbean.
Taliban personnel shout slogans as they celebrate the fourth anniversary of their takeover of Afghanistan near the Kabul Polytechnic University in Kabul on August 15, 2025. (Photo by WAKIL KOHSAR/AFP via Getty Images)

The Experience of Time and Tyranny Under the Taliban in Afghanistan

The clock may seem to tick at the same rate for everyone, but its rhythm is felt differently under the weight of the Taliban's draconian rule.
IMAGES (left to right): Natural disaster and its consequences (via Getty Images); In this picture taken on September 28, 2022, an internally displaced flood-affected family sits outside their tent at a makeshift tent camp in Jamshoro district of Sindh province (Photo by Rizwan Tabassum/AFP via Getty Images; Trees smolder and burn during the Dixie fire near Greenville, California on August 3, 2021. – Numerous fires are raging through the state’s northern forests, as climate change makes wildfire season longer, hotter and more devastating. (Photo by JOSH EDELSON/AFP via Getty Images)

Just Security’s Climate Archive

A catalog of articles analyzing the diplomatic, political, legal, security, and humanitarian consequences of the international climate crisis.
Afghan women walk along a stone-laden street on the outskirts of Kabul on July 22, 2025. (Photo by WAKIL KOHSAR/AFP via Getty Images)

What the Erosion of the International System Means for Afghanistan

The ongoing struggle of Afghanistan’s exiled democratic movement is a vital bulwark against a rising tide of authoritarianism and extremism.
People install obituaries for people killed in a terrorist attack

Regular ISIL-Threat Review at U.N. Shows U.S., Russia, China, and European Interests and Competition on Counterterrorism

An upcoming UNSC review is a good chance for States to reflect on what is needed in implementing the Council's counterterrorism work.
Demonstrators take part in a protest in front of the European Commission representation in Warsaw demanding more restrictive sanctions against Russia and arms supplies for Ukraine on January 8, 2024. (Photo by WOJTEK RADWANSKI/AFP via Getty Images)

It’s Time to Designate The Base as an FTO

With increasing violent extremism and waning DOJ interest in curbing far-right extremism, a failure to address the threats posed by The Base could prove fatal.
Syrian President Ahmed al-Sharaa speaks during a joint press conference with French President after a meeting at the Elysee Palace in Paris, on May 7, 2025. (Photo by STEPHANIE LECOCQ/POOL/AFP via Getty Images)

Understanding the Trump Administration’s Delisting of Hay’at Tahrir al-Sham

On July 8, the Department of State removed Hay’at Tahrir al-Sham (HTS), also known as Jabhat al-Nusrah, from the Foreign Terrorist Organization (FTO) list. In a press release…
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