"Dark Tetrad personalities include narcissism, Machiavellianism, and 
psychopathy .  ... Destructive though they might be, those of darker 
disposition also embody the qualities that society reveres as 
"leadership skills." "

http://qz.com/322430/how-to-tell-if-your-coworker-is-an-everyday-sadist/

www.peoplewho.org