Profiles of Individual Radicalization in the United States (PIRUS) is a database of 3,203 Islamist, far-left, far-right, and single-issue extremists who have radicalized to violent and non-violent extremism in the United States from 1948 through 2021. This update adds 955 subjects to the database who were charged with committing extremist crimes in the United States from 2019-2021.1 The database is freely available for download on START’s webpage at https://www.start.umd.edu/profiles-individual-radicalization-united-states-pirus-keshif. The analysis for this research brief draws on the full dataset and illustrates the important differences that exist across ideological groups and highlights recent trends in the data.
Jensen, Michael, Sheehan Kane, and Elena Akers. 2023. "Profiles of Individual Radicalization in the United States (PIRUS)." College Park, MD: START (March). https://www.start.umd.edu/sites/default/files/publications/local_attachments/PIRUS%20March%202023%20Update.pdf