Terrorism & Violent Extremism

Domestic Violent Extremism

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173 Articles
Two soldiers in the foreground wearing fatigues and olive green caps place flags in front of each of the small, white headstones lined up along the green spring grass under leafy trees at Arlington National Cemetery Arlington, Virginia.

To Memorialize the Fallen, Renew the Pursuit of Peace

This Memorial Day, to honor the memory of those who gave their lives in war, Americans should consider how to help mold a more peaceful future at home and abroad.

How the Domestic Terrorist Label Endangers Rights and Drives Extremist Violence

Prepared congressional testimony for a Senate hearing that was postponed.

Collection: Just Security’s Counterextremism Initiative

Introducing Just Security's new Collection on the evolving threats of violent extremism and terrorism.
Backside of an officer, wearing a vest that reads: "POLICE COUNTERTERRORISM."

The U.S. Shouldn’t Lose Sight of the Real Terrorist Threats

As the Trump administration portrays far-left activists and drug cartels as major terrorist threats, the most dangerous foes are plotting.
Armed Secret Service agents stand on stage

To Counter Rising Political Violence, America Needs to Reinforce Its Early Warning Infrastructure

Stakeholders must reinforce U.S. monitoring and response infrastructure to address growing risks of political violence.
Mourners hold their candles in the air during a moment of silence during a vigil to mark one week since the mass shooting at the Route 91 Harvest country music festival, on the corner of Sahara Avenue and Las Vegas Boulevard at the north end of the Las Vegas Strip, on October 8, 2017 in Las Vegas, Nevada. (Photo by Drew Angerer/Getty Images)

No, There Isn’t a Trans Shooter Problem

Reactions to mass shootings often fixate on gender identity, ignoring extremist ideologies. This misplaced focus fuels scapegoating and deepens division.
The logo of the Federal Bureau of Investigation (FBI) is seen at the Los Angeles Federal Building in May 2025. (Photo by PATRICK T. FALLON/AFP via Getty Images)

How the DOJ is Prosecuting Nihilistic Violent Extremism as Domestic Terrorism

The DOJ has charged an alleged nihilistic violent extremist with conspiracy to provide material support to terrorists for the first time.
Hungarian activists of the neo-Nazi Blood and Honour group hold flags in Budapest 11 February 2006 as participants bring wreaths at the tomb of Unknown Soldier in Heroes Square in Budapest where a German WWII helmet and wood cross were placed. More than 600 people attended the event to commemorate the 60th anniversary of the ill-fated escape attempt of Nazi German and Hungarian soldiers from Buda Castle, which was besieged 11 February 1945 by the Soviet Red Army at the end of World War II. (Photo by ATTILA KISBENEDEK/AFP via Getty Images)

State Dept’s Foreign Terrorist Designations Undermine Claims of “Antifa” Threat

Leading counter-extremism expert unpacks the administration's claimed designation of "Antifa Groups"
In this photo illustration the logo of US online social media and social networking site 'X' (formerly known as Twitter) is displayed centrally on a smartphone screen alongside that of Threads (L) and Instagram (R) on August 01, 2023 in Bath, England. On the top row the logo of online video sharing and social media platform YouTube is seen alongside that of Whatsapp and TikTok. Along the bottom row Facebook, Quora amd Messenger are displayed.

The Feedback Loop Between Online Extremism and Acts of Violence

Each new incident of political violence is followed by a wave of digital celebration, intimidation, and imitation. Responses remain polarized and superficial.
U.S. President Donald Trump (C) speaks as (L-R) White House Deputy Chief of Staff Stephen Miller, White House Chief of Staff Susie Wiles, U.S. Attorney General Pam Bondi, U.S. Secretary of Homeland Security Kristi Noem and Federal Bureau of Investigation Director Kash Patel listen during a roundtable discussion in the State Dining Room of the White House on October 08, 2025 in Washington, DC. Trump’s administration held the roundtable to discuss the anti-fascist Antifa movement after signing an executive order designating it as a “domestic terrorist organization”. (Photo by Anna Moneymaker/Getty Images)

How Designating Antifa as a Foreign Terrorist Organization Could Threaten Civil Liberties

If the Trump administration designates Antifa as an FTO, it could have implications extending beyond anti-fascist activists to the entire architecture of U.S. civil society.
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.
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.
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