A recent study titled "Leader Emergence: The Case of the Narcissistic Leader" describes how narcissists have skills and qualitiesconfidence, extraversion, a desire for powerthat propel them into leadership roles but that when true narcissists are in charge, other aspects of their makeupa feeling the rules don't apply to them, a need for constant strokingcan have "disastrous consequences."
MORE...
http://www.slate.com/articles/health_and_science/science/2009/03/but_enough_about_you_.single.html
And Begala is right: once a bully - always a bully (narcissist). From the same article:
If they do seek treatmentusually under duressa primary outcome is that they drive their therapists bonkers. A study in the American Journal of Psychiatryfound that "clinicians reported feeling anger, resentment, and dread in working with narcissistic personality disorder patients; feeling devalued and criticized by the patient; and finding themselves distracted, avoidant, and wishing to terminate the treatment."
In a paper in Comprehensive Psychiatry, researchers explored whether NPD should even be considered a disorder since the people who have it, by definition, think so highly of themselves. The authors conclude it is a pathological condition but one that uniquely causes "pain and duress" not to the sufferers but to those closest to them. Psychologist Allan N. Schore, an associate clinical professor at the David Geffen School of Medicine at UCLA says NPD can be summed up as, "Contempt of other people and their emotions." People with NPD are convinced there is nothing wrong with them; it's everyone around them who is impossible or crazy. There's some truth to their perception because often the spouse and children of the narcissist have been driven mad by their cruelty, disparagement, rages, and vindictiveness.
I've dated these types. Bullies. YES. That is caused by their extreme narcissism.