I have a secular hypothesis about stupidity that echoes this: that it’s root is narcissism. A person becomes stupid when they come to believe that they could n

I have a secular hypothesis about stupidity that echoes this: that it’s root is narcissism. A person becomes stupid when they come to believe that they could not be wrong. This could be why profoundly accomplished people sometimes become stupid. Their accomplishment convinces them that they are intellectually superior, at which point they proceed to stop thinking critically.