To be clear, I don't think genuine pathological narcissism is actually a particularly common trait, maybe 5% type levels. The problem is that a single genuine

To be clear, I don't think genuine pathological narcissism is actually a particularly common trait, maybe 5% type levels. The problem is that a single genuine narcissist can make an environment absolutely horrible for a large number of people, meaning that even at 1/20, if you work in an area with 50-60 people, you're likely to have at least 2-3 narcissists in that group. One other thing, I wouldn't call narcissism a "mental illness". There's a difference between a "mental illness" and a personality disorder. Narcissist Personality Disorder is effectively the clinical name for what is commonly known as "being an ass-hole", in the same way that anti-social personality disorder is just the clinical name for what is commonly known as "being a psycho".