'Brilliant, wise, humane, scientific, and kind. Beliefism is exactly what the doctor ordered - and it could change the world' Cass R. Sunstein, Robert Walmsley University Professor, Harvard University 'Repeated throughout is the fine principle that whatever position you wish to argue on an issue, you must be honest about what bad effects, as well as good, will follow.' Steven Poole, The Times Beliefism (noun): Discrimination against people who disagree with us Do you avoid people who are strongly against immigration? Or strongly for trans rights? Against abortion? For drug legalisation? We might like to think that we're tolerant, but many of us struggle to engage with people whose opinions differ strongly from our own-even if they might have something useful to contribute to the debate. That means we're falling victim to what behavioural scientist Professor Paul Dolan defines as Beliefism: discrimination against those with different beliefs to us. Drawing on the evidence from across