This review analyses the substantial academic literature on what causes violent extremism. It examines the 17 hypotheses discussed in the 2008 DFID paper ‘Drivers of Violent Extremism’, and summarises the strength of the evidence on each. It notes that an alignment of situational, social-cultural and individual factors at the macro, meso and micro levels is necessary for violent extremist movements to develop and for individuals to join them.
Allan, H.; Glazzard, A.; Jesperson, S.; Reddy-Tumu, S. &; Winterbotham, E. (2015). Drivers of violent extremism: hypotheses and literature review. London, UK: RUSI.