Isn't that also known as ambition? I'm sure there are quite a few like that in business.
I would never have thought of Armstrong as a sociopath before until I saw his interview with Oprah. He seemed strangely cold and detached and cut off from his feelings.....it actually reminded me of some of Savile's more belligerent interviews.
That, combined with the stories of him bullying and trampling over numerous friends and colleagues makes me suspicious that he may be some form of sociopath or narcissist.
Incidentally, Oprah actually dropped the word 'sociopath' into the interview at one point in relation to him.