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What is it that drives ordinary people to condone political violence, and some to commit it? As democracies increasingly exist in conditions where violence can flourish, Stanford University polarisation expert Alison Goldsworthy will scrutinise the latest research showing it is dogmatism, not just authoritarian tendencies that enable it. This means we are all susceptible - including, uncomfortably for ‘liberals’ who hold strongly to being open minded (like the ones who mused about the bullet going ‘just a few inches to the right’ after Trump's attempted assassination).

Leveraging insights from political, behavioural and neuro sciences Alison will track the journey of the biology, instincts, emotions and actions to explain how and why a social media feed can trigger the rewiring of a brain to chuckle at, then endorse violence. She'll explain why this creating this climate increases the likelihood that some people will commit violence. And she'll examine what we can do to prevent ourselves sliding into this vice-like grip.

Producer: Giles Edwards.