START has updated its Profiles of Individual Radicalization in the United States (PIRUS) database with new data to now include more than 2,100 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 2017. Far-right extremists make up the largest ideological group in the database (n=922), followed by Islamist extremists (n=496). The remainder of the individuals in the data are far-left extremists (n=367) or individuals in the “single-issue” category (n=364), whose beliefs vary. Read the updated analysis here.
A Department of Homeland Security Emeritus Center of Excellence led by the University of Maryland