About 5% of people are narcissistic sociopaths. They don't believe that other people exist, or at least are anything more than actors in a play they control.

About 5% of people are narcissistic sociopaths. They don't believe that other people exist, or at least are anything more than actors in a play they control. Try not to elect one as President. This is a good pop-science book about it: https://en.wikipedia.org/wiki/The_Psychopath_Test https://en.wikipedia.org/wiki/The_Psychopath_Test