For now, the main contributing factors to NPD seem to be: Genetics
https://my.clevelandclinic.org/health/diseases/9742-narcissistic-personality-disorder
Tsk tsk tsk
I'm curious, what's your job?
My job is to portray truthful information so that stakeholders can gain insight.
So I enjoy looking at the information you give me and see if it's correct and if it's the complete picture.
You're quite biased toward nurture and give little regard to nature in this subject.
While it's common knowledge that both are impactful.
Human behaviour. You'll find speakers that talk more about the nurture part. You'll find speakers that talk more about the nature part.
You are biased toward the nurture part, so you will align yourself more with speakers that talk about that. While willfully ignoring the other side of the truth.
We all do this.
It's beautiful
There's so much information and so little time, on top of that you need to cycle into periods where you consume less information or you'll just go insane.
So, if you want your information to reach people, do more effort.