I consider this a 'must read' for anyone wanting to understand the polarization of today's society inflamed by social media. My reason for reading this is to gain insight for work strategies since the modern approach is to deny what those truly trained in an area have to say. What I learned is that none of us know as much as we think we do (the knowledge illusion). That's not necessarily a bad thing except when we don't realize it. The other thing is (and really this is true--look at your own interactions) people really don't want to be inundated with facts. The challenge is making information that is complex understandable in very basic bits. Obviously there are no easy answers but understanding the problem and being offered some approaches is very helpful. Also this book addresses recognizing the knowledge we rely on which is outside of own heads--this is the why we never think alone part. These are important topics. The authors have done a great job organizing and presenting the material.