Algorithms, echo chambers, and the road to extremism

This episode explores how extremist ideologies spread online and offline, who is most vulnerable to radicalization, and the pathways that lead people into — and sometimes out of — extremist communities. We discuss the role of social media, traditional media, and even bots in amplifying harmful narratives, as well as the psychological and social vulnerabilities that make individuals more susceptible. We break down the stages of radicalization, from initial uncertainty to community immersion and, in rare cases, violent action. We also considers the impact on families and communities, and what can be done to build resilience and support people away from extremist beliefs.   Content Warning: We discuss real-world examples of radicalisation and violence that may be disturbing or frustrating for some listeners. Support resources: If you have been affected by the content of this episode in any way, the supports at the link below may be of assistance. If you are not in Ireland, please seek supports local to you.  Irish Health Service Executive mental health supports The Samaritans Pieta House - Suicide and Self-harm Resource Other helpful resources https://www.factchecking.ie/  European Digital Media Observatory (EDMO) https://www.medialiteracyireland.ie/training-development/    Research Global Witness - reports on bot acticvity and disinfomation online Scrivens, R. & Conway, M. (2019). The roles of ‘old’ and ‘new’ media tools and technologies in the facilitation of violent extremism and terrorism Borum, R. (2010). Understanding Terrorist Psychology Schuurman, B. & Carthy, S. L. (2025). Citizens, Extremists, Terrorists: Comparing Radicalized Individuals with the General Population Booth, E. et al. (2025). Conspiracy, misinformation, radicalisation: understanding the online pathway to indoctrination and opportunities for intervention