Is it just laziness that has the modern media fixated on two sides or does the christian culture demand a good vs, evil paradigm?
It is no wonder that the real diversity of the human population has such a hard timebeint recognized.
On the pther hand, perhaps the binary model is a consequence of many humans defining themselves in terms of another. How common is narcissism? The narcissist is not inherently dangerous to anyone, so there would be no evolutionary need to get rid of him/her. Can human society accommodate narcissists? Obviously.