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A conceptual illustration showing a lone figure in a green shirt walking along a crumbling stone path that disintegrates into scattered fragments and fiery orange chaos on the right. The left depicts a serene green landscape with a setting sun, rolling hills, and trees, symbolizing the fragmentation of ideological frameworks and the collapse of defined structures into disordered violent extremism.

The end of ideological violence

$A conceptual double-exposure photo showing a young adolescent's face blended with a cracked, weathered wall texture, symbolizing political alienation and disillusionment. The left half reveals the youth's serious expression while the right dissolves into fractured, peeling surfaces, visually representing distrust, powerlessness, and psychological fragmentation associated with the pathway from system-disillusionment toward political radicalism in Swedish adolescents.$

System-disillusioned youth radicalize: The role of political alienation in the formation of political radicalism

$A photo showing a fragmented, close-up human face in muted blue-gray tones, overlaid with distorted textures and streaks of vivid red. The image is heavily manipulated with cracked, glass-like fractures and double-exposure effects that obscure the eyes, evoking themes of psychological rupture, obscured identity, and violence—visually paralleling the article's discussion of ideology-free extremism fixated on aggression itself.$

Extremism without ideology

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Sander van der Linden

Department of Psychology, University of Cambridge

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Sander van der Linden is a Professor of Psychology at the University of Cambridge. Van der Linden's research covers climate change risk perception, the spread and correction of misinformation, inoculation theory, and social influence, with work ranging from large-scale experiments on scientific consensus to gamified interventions designed to confer psychological resistance to manipulation. Additional research interests include authoritarianism, democratic backsliding, and the prevention of violent extremism. Van der Linden has also contributed to the study of narcissism measurement, conformity, and the behavioral determinants of climate-related attitudes.