Fascinating article from The Atlantic: http://www.theatlantic.com/health/archive/2013/11/all-bullies-are-narcis\ sists/281407/ <http://www.theatlantic.com/health/archive/2013/11/all-bullies-are-narci\ ssists/281407/>
Read through it and see if it doesn't remind you of the Mean Girl behavior we've seen on this forum, especially the credo of the MGC's founder: "I am a winner because you are a loser."