Klarevas, Louis J. (ljk2149)

Louis James Klarevas

Research Professor

Educational Background

Ph.D. American University

B.A. University of Pennsylvania

Scholarly Interests

Dr. Louis Klarevas is Research Professor at Teachers College, Columbia University, and the author of Rampage Nation: Securing America from Mass Shootings (2016). In the past, he has taught at American University, George Washington University, City University of New York, New York University, and the University of Massachusetts–Boston. He has also held the positions of Defense Analysis Research Fellow at the London School of Economics and Political Science and as United States Senior Fulbright Scholar in Security Studies at the University of Macedonia. One of the leading authorities on mass shootings and school violence in the United States, he is currently an advisor to nine state Attorneys General on gun violence and firearm laws as well as a consultant to the federal government on public safety and security issues. You can follow him on Twitter: @Klarevas.

His scholarly interests include:

School Violence

Mass-Casualty Violence

Active Shootings and Mass Shootings

Gun Violence

Firearm Laws

Public Policy: Public Safety and Public Health

Selected Publications


  • Rampage Nation: Securing America from Mass Shootings (2016)

Scholarly Articles and Reports

  • “State Firearm Laws, Gun Ownership, and K-12 School Shootings: Implications for School Safety,” Journal of School Violence, 2022 (co-authored with Paul M. Reeping, Sonali Rajan, et al.)
  • “The Effect of Large-Capacity Magazine Bans on High-Fatality Mass Shootings, 1990-2017,” American Journal of Public Health, 109, no. 12 (December 2019): 1754-1761 (co-authored with Andrew Conner and David Hemenway)
  • “Changes in U.S. Mass Shooting Deaths Associated with the 1994-2004 Federal Assault Weapons Ban,” Journal of Trauma and Acute Care Surgery, 86, no. 5 (May 2019): 926-928 (correspondence)
  • Firearms on College Campuses: Research Evidence and Policy Implications, Report by the Johns Hopkins University Center for Gun Policy and Research, October 2016 (co-authored with Daniel W. Webster, John J. Donohue, et al.)


  • “Why Our Response to School Shootings Is All Wrong,” Los Angeles Times, May 25, 2022 (co-authored with Sonali Rajan and Charles Branas)
  • “COVID-19 Is a Threat to National Security. Let’s Start Treating It as Such,” Just Security, August 6, 2020 (co-authored with Colin P. Clarke)
  • “Careful How You Talk about Suicide, Mr. President,” New York Daily News, March 25, 2020 (co-authored with Sonali Rajan, Charles Branas, and Katherine Keyes)
  • “Only as Strong as Our Weakest Gun Laws: The Latest Mass Shooting Makes a Powerful Case for Federal Action,” New York Daily News, November 8, 2018
  • “What to Worry, and not Worry, About: The Thwarted Pipe-Bomb Attacks Point to Homeland Security Successes and Vulnerabilities,” New York Daily News, October 25, 2018
  • “After the Santa Fe Massacre, Bury the ‘Good Guy with a Gun’ Myth: Armed Staffers Won’t Deter Shooters or Keep Kids Safe,” New York Daily News, May 22, 2018
  • “If the Assault Weapons Ban ‘Didn’t Work,’ Then Why Does the Evidence Suggest It Saved Lives?” Los Angeles Times, March 11, 2018 (correspondence)
  • “It’s the Guns (and Ammo), Stupid: Dissuading Killers and Hardening Targets Matter Too, But Access to Weapons Matters Most,” New York Daily News, February 18, 2018
  • “The Texas Shooting Again Reveals Inadequate Mental-Health Help in the U.S. Military,” New York Daily News, November 7, 2017
  • “Why Mass Shootings Are Getting Worse: After Vegas, We Urgently Must Fix Our Laws,” New York Daily News, October 2, 2017
  • “London and the Mainstreaming of Vehicular Terrorism,” The Atlantic, June 4, 2017 (co-authored with Colin P. Clarke)
  • “Almost Every Fatal Terrorist Attack in America since 9/1 Has Involved Guns.” Vice, December 4, 2015
  • “Firearms Have Killed 82 of the 86 Victims of Post-9/11 Domestic Terrorism,” The Trace, June 30, 2015
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