This article investigates how experiences of loneliness play a role in radicalization processes.
The authors’ main objective is to develop an empirically grounded theory of loneliness in contemporary forms of radicalization.
Taking Hannah Arendt’s political theory, which posits loneliness as a breeding ground for terror as a starting point, an analysis guided by a critical phenomenological approach is constructed, adopting the perspective of subjective experiences while exploring how these are embedded in specific social structures in contemporary societies.
Empirical data is drawn from two sets of cases: lone-actor terrorists and female Western affiliates of ISIS.
Conclusions point to the fact that while the fear of individual and collective extinction plays an important role for right-wing lone-actor terrorists, experiences of discrimination and marginalization are crucial in the case of Islamist radicalization in Western countries.
Learn more about this study here: https://doi.org/10.1177/01914537251334550
Reference
Tirkkonen, S. K., & Tietjen, R. R. (2025). Loneliness and radicalization. Philosophy & Social Criticism, 0(0)

