Pole Apart by Alison Goldsworthy, Laura Osborne, Alexandra Chesterfield

In Poles Apart, an expert on polarisation, a behavioural scientist and a professional communicator explain why we are so prone to be drawn into rival, often deeply antagonistic factions. They explore the shaping force of our genetic make-up on our fundamental views and the nature of the influences that family, friends and peers exert. They pinpoint the economic and political triggers that tip people from healthy disagreement to dangerous hostility, and the part played by social media in spreading entrenched opinions. And they help us to understand why outlooks that can seem so bizarre and extreme to us seem so eminently sensible to those who hold them.