Personality disorder rates are higher in high-income countries. Whereas about one in 10 American adults (if not slightly more) meet diagnostic criteria for a personality disorder, the worldwide prevalence is lower—sitting at about 8%, according to a 2020 literature review.

Put that with the 6.2%, and that makes it sound like most personality disorders are NPD. That sounds unbalanced and suspect. Where did you get that figure? Drag always heard 1% for each.

Statement #3 is hearsay. I would argue the only thing you can know is that you personally do not like pain. There is no absolute good or bad, only what aligns or doesn’t with your passions (using the term loosely here).

The Golden Rule of “treating others as one would want to be treated”, is a logical conclusion that comes from experiencing the world and seeing that there’s a high probability that others will return actions in kind. It’s not perfect since everyone has different preferences (just look at the variety of sexualities and kinks out there).

Pain and pleasure are passions. You said you were gonna use pure reason. Not use reason as an aid to passions.