PIRUS - Reports

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Complete information on the Empirical Assessment of Domestic Radicalization (EADR) project, which yielded PIRUS, can be found on the EADR project page. That project's final report, which includes additional information about PIRUS, and findings from START’s analysis of the data, is available here: Empirical Assessment of Domestic Radicalization (EADR) Final Report.

A complete list of PIRUS reports is below.

• Risk and Rehabilitation: Supporting the Work of Probation Officers in the Community Reentry of Extremist Offenders 2024 (Report)

• The Mobilization Puzzle: How Individual, Group, and Situational Dynamics Produce Extremist Outcomes 2023 (Report)

• Prosecuting Terror in the Homeland: An Assessment of Sentencing Disparities in United States Federal Terrorism Cases 2023 (Research Brief)

• PIRUS: Comparing Violent and Non-Violent Offenders 2023 (Research Brief)

• PIRUS: Mass Casualty Extremist Offenders with U.S. Military Backgrounds 2023 (Research Brief)

• The Link Between Age and Extremism 2023 (Article)

• Extremism in the Ranks and After 2023 (Research Brief)

• Choosing Where to Fight: Do Social Networks Distinguish American ISIS Foreign Fighters from ISIS-Inspired Terrorists 2023 (Journal Article)

• Profiles of Individual Radicalization in the United States: Mass Casualty Extremist Offenders 2023 (Research Brief)

• Profiles of Individual Radicalization in the United States 2023 (Research Brief)

• Radicalization in the Ranks 2022 (Report)

• A Multi-level Approach to the Study of Violent Extremism 2022 (Report)

• Proud Boys Crimes and Characteristics 2022 (Research Brief)

• It wasn’t just Proud Boys. Interconnected extremists converged on Jan. 6. 2022 (Article)

• QAnon Offenders in the United States Open configuration options 2021 (Research Brief)

• QAnon-inspired violence in the United States: an empirical assessment of a misunderstood threat 2021 (Journal Article)

• The Link Between Prior criminal record and Violent Political Extremism in the United States 2020 (Book Chapter)

• Profiles of Individual Radicalization in the United States 2020 (Research Brief)

• Contextualizing Disengagement: How Exit Barriers Shape the Pathways Out of Far-Right Extremism in the United States 2020 (Journal Article)

• Who is more violent in extremist groups? A comparison of leaders and followers 2019 (Journal Article)

• Profiles of Individual Radicalization in the United States—Desistance, Disengagement, and Deradicalization(PIRUS-D3) 2019 (Research Brief)

• Prison and Violent Political Extremism in the United States 2019 (Research Brief)

• Social Learning and Social Control in the Off- and Online Pathways to Hate Crime and Terrorist Violence 2019 (Journal Article)

• The Use of Social Media by United States Extremists 2018 (Research Brief)

• Radicalization to Violence: A Pathway Approach to Studying Extremism 2018 (Journal Article)

• Correlates of Violent Political Extremism in the United States 2018 (Journal Article)