Political Polarization - Insights from History and Psychology

What psychology experiments tell you about why people deny facts

https://www.economist.com/united-states/2018/12/08/what-psychology-experiments-tell-you-about-why-people-deny-facts

Origins of Modern Day Political Polarization
https://www.theatlantic.com/magazine/archive/2018/11/newt-gingrich-says-youre-welcome/570832/

The key to understanding the 2018 midterm results — and the future of American politics — isn’t ideology or culture. It’s the different economies of red and blue America.

https://www.washingtonpost.com/news/magazine/wp/2018/11/29/feature/the-key-to-understanding-americas-red-blue-split-isnt-ideology-or-culture-its-economics/

The Real Roots of American Rage

https://www.theatlantic.com/magazine/archive/2019/01/charles-duhigg-american-anger/576424/