Could a lack of humility be at the root of what ails America?

There are a lot of reasons behind the political polarization of the country and the deterioration of civic discourse.

• Frank T. McAndrew
• The Conversation

I wonder if a lack of humility is one of them.

In his recent book, “The Death of Expertise,” national security expert Tom Nichols described a type of person each of us probably knows:

“They are young and old, rich and poor, some with education, others armed only with a laptop or a library card. But they all have one thing in common: They are ordinary people who believe they are actually troves of knowledge. [They are] convinced they are more informed than the…

• Could a lack of…