I find it interesting that 1% of the population are psychopathic, which is an innate condition, whereas another 3 to 4% are sociopaths, which is acquired through environment. Either way, these people completely or mostly lack empathy for other people. Psychopaths also don't feel anxiety the way other people do. Bad things don't stress them as much.
It is sad that people are this way, but I am a bit curious about the fact that we have all these people running around in society. They claim that most corporate CEO's are psychopaths, which sounds plausible, and many claim that Steve Jobs was a psychopath, which also sounds possible.
Maybe it is an evolutionary survival strategy. In the event that "the shit hits the fan", maybe the psychopaths will be more likely to survive. I am certain of it.