Not all psychopaths aren't all bad though, are they? I watched a documentary a few years back - might have been the channel 4 one, I can't remember. But the presenter himself ended up testing positive for being a psychopath - but he was a respected, law abiding, non-horrible person. The conclusion they came to was that psychopathic traits are there from birth, but your upbringing can have a huge impact on whether you end up being a dangerous/horrible person or not. And Michael Mosely, the BBC health presenter is a psychopath - if you google it you can find out more. He found this out as part of one of his programmes investigating the brains of psychopaths. This description from the Channel 4 website sums it up quite well:
"Some of us may score higher on some psychopathic traits than on others. But unless you score high on all of them, you don't really have anything to worry about! Another misconception about psychopaths concerns diagnosis. A lot of people think that you're either a psychopath or you're not, that it's all very black and white. But there is evidence to suggest that it's not as clear-cut as this. In fact, psychopathy – like height and weight, for example – lies on a spectrum...
Within the framework of clinical psychology, a psychopath is someone with a distinct cluster of personality traits including ruthlessness, fearlessness, narcissism, charm, charisma, impulsivity, persuasiveness, manipulation and a lack of conscience and empathy. Sure, these traits may well come in handy if you aspire to be an axe-murderer! But they can also come in handy in the courtroom, on the trading floor, or in the operating theatre. It just depends on what else you've got going on in your personality, and the start you get in life."
At the sharp end you may well find your serial killers and axe murderers but, all of us have our place at some point along the continuum."