before you do, better read this book...
Sociopathy is more common than most people realize. 1 in 25 according to this.
I think most of us had more exposure to them in childhood because they tend to get removed from mainstream society as they get older (either incarcerated or self-segregated as they get into organized crime etc). Or they learn how to hide it.
Roughly 1 in 25 people are sociopaths, so of course the vast majority are non violent. Still, it isn't something that can ever be cured and the sociopath themselves would never see it as something needing to be "fixed", they simply will not and cannot ever care about that fact despite any violent or non-violent mayhem they might cause.
I am coming off of recently reading The Sociopath Next Door which is definitely biased against those with the condition and may be coloring my own perceptions here.
That is not a stupid question. I had a lot of the same questions and this book was really insightful.
I was reading a book about sociopaths and the author said that when asked, one particular sociopath told her what he wanted from people was pity so he could manipulate them.