A comparison of political violence by left-wing, right-wing, and Islamist extremists in the United States and the world

Katarzyna Jasko, Gary LaFree, James Piazza, Michael H. Becker

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

Although political violence has been perpetrated on behalf of a wide range of political ideologies, it is unclear whether there are systematic differences between ideologies in the use of violence to pursue a political cause. Prior research on this topic is scarce and mostly restricted to self-reported measures or less extreme forms of political aggression. Moreover, it has generally focused on respondents in Western countries and has been limited to either comparisons of the supporters of left-wing and right-wing causes or examinations of only Islamist extremism. In this research we address these gaps by comparing the use of political violence by left-wing, right-wing, and Islamist extremists in the United States and worldwide using two unique datasets that cover real-world examples of politically motivated, violent behaviors. Across both datasets, we find that radical acts perpetrated by individuals associated with left-wing causes are less likely to be violent. In the United States, we find no difference between the level of violence perpetrated by right-wing and Islamist extremists. However, differences in violence emerge on the global level, with Islamist extremists being more likely than right-wing extremists to engage in more violent acts.

Original languageEnglish (US)
Article numbere2122593119
JournalProceedings of the National Academy of Sciences of the United States of America
Volume119
Issue number30
DOIs
StatePublished - Jul 26 2022

All Science Journal Classification (ASJC) codes

  • General

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