I am about half way through Simon Baron-Cohen’s “The Science of Evil” or “Zero Degrees of Empathy” in the UK, and it is really very good; he manages to explain pretty complex neuroscience terminology in a very palatable way.
I am now convinced that understanding empathy is the only way we can really understand the spectrum of human behavior, from the evil to the insanely benevolent. Baron-Cohen talks about the three types of zero-negative personality types (those that have no/limited capacity for empathy), those suffering from Borderline Personality Disorder, psychopaths and narcissists.
There are at least ten centers in the brain that appear to be involved in moral decision-making and moral awareness. I’m really interested to see where these studies go.
I highly recommend this book!