This book shows that you could be one conversation away from changing someone's mind about something, maybe a lot of things. Self-delusion expert and psychology nerd David McRaney sets out to discover not just what it takes to influence others, but why we believe in the first place.

Along the way he meets a former Westboro Baptist Church member who was deradicalised on Twitter, goes deep canvassing to see how quickly people will surrender their character-defining views, finds a 9/11 Truther who turns his back on it all, and reveals how, within a few years, half a country can go from opposing the 'gay agenda' to happily attending same-sex weddings.