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Strengthening National Security Resilience in Japan

Japan has many strengths that give it tremendous potential for resilience. However, further investments are required to bolster relatively undeveloped elements of national security resilience that China or another foe may seek to exploit.

Report by Daniel Byman, Nicholas Szechenyi, and Riley McCabe — December 18, 2025

Ideological Trends in U.S. Terrorism

The Warfare, Irregular Threats, and Terrorism Program examines the state of terrorism in the U.S., finding left-wing violence has risen in the last decade but from very low levels and still well below historic levels of violence by right-wing and jihadist actors.

Analysis by Daniel Byman and Riley McCabe — September 26, 2025

The Wrong Way to Fight the Cartels: CSIS Experts in Foreign Affairs

Experts from the CSIS Americas Program and Warfare, Irregular Threats, and Terrorism Program argue in Foreign Affairs that President Trump’s approach to the cartels risks repeating the mistakes of the “War on Terror.”

Commentary by Ryan C. Berg, Daniel Byman, Iselin Brady, Riley McCabe, Alexander Palmer, and Henry Ziemer — September 15, 2025

Aid Cuts Make Peace Negotiations in Ukraine Less Likely

Cutting U.S. aid to Ukraine now would not hasten peace. It would encourage the Kremlin to believe what it has long hoped for—that U.S. resolve is fleeting, and that time is on Russia’s side.

Commentary by Riley McCabe — June 16, 2025

Russia’s Battlefield Woes in Ukraine

Russia has performed poorly on the battlefield in Ukraine and will likely hit the 1 million casualty mark in the summer of 2025. New CSIS data details Russia's slow rate of advance, heavy losses of equipment, and significant casualties.

Brief by Seth G. Jones and Riley McCabe — June 3, 2025

Can Ukraine Fight Without U.S. Aid? Seven Questions to Ask

A complete cutoff of U.S. aid would significantly harm Ukraine’s ability to fight Russia but would not necessarily lead to immediate defeat—and more limited cutoffs would have more limited effects on Ukraine’s battlefield performance.

Report by Iselin Brady, Daniel Byman, Riley McCabe, and Alexander Palmer — May 19, 2025

Global Terrorism Threat Assessment 2025

Terrorism remains a threat to U.S. citizens, assets, and interests despite the national security community’s decreasing focus on counterterrorism.

Report by Alexander Palmer, Riley McCabe, Daniel Byman, and Skyeler Jackson — March 28, 2025

The Escalating Attacks on Tesla Facilities

Since January 2025, a series of attacks have targeted Tesla facilities and vehicles across the United States, bringing renewed attention to a long-standing debate among policymakers, scholars, and law enforcement over what qualifies as domestic terrorism.

Critical Questions by Riley McCabe — March 20, 2025