Since it's always a subject of interest, in this thread and others, and I believe knowledge is power and protection, and this is something I've had to
unfortunately learn a lot about, I'm gonna crack open my DSM 5 and tackle this:
Is narcissistic sociopathy an actual diagnosis, because I’m interested in reading more about it. It seems that Chris Watts and Scott Peterson definitely had it and many more are afflicted. Scary!
The diagnosis for sociopathy is Anti Social Personality Disorder (ASPD) and the diagnosis for malignant narcissism is Narcissistic Personality Disorder (NPD).
The best, most helpful books I have read on this subject are:
"The Sociopath Next Door" by Martha Stout
"The Mask of Sanity" by Hervey Cleckly
"Malignant Self-Love" by Sam Vaknin
They are all science-based and written by academic researchers, but accessible to non-professionals. They were recommended to me by clinical social work professors.
I have an internal debate all the time about the role of mental illness in murder. Certainly there are bona fide mental disorders... many of them. But do the diagnoses of these illnesses get over-applied? Is Chris Watts really suffering from a mental disorder that made him different from other people? I know it would give us a lot of comfort to segregate these monsters into their own categories and know that “a decent person” would never do those acts. But what if he isn’t suffering from a disorder at all - what if a couple of months before August he was just like anyone else, flawed but someone who loved his family, and then when left alone to live like a single person for a few weeks, opportunities presented themselves and he made conscious choices that took him down a path. And he was plenty social enough and giving enough and emotional enough for NK, but turned off his feelings for his family in the process. His choices led him there, not some disorder, is my current line of thinking. MHO
BBM. First we have to understand where personality disorders fit into the broad, general category of mental illness. Here's a page from the Mayo Clinic that does a good job:
Personality disorders - Symptoms and causes
It's important to understand that people with your garden variety mental illness, say anxiety, or depression, or post-trauma symptoms, and even many of the personality disorders, are no more likely than the general population to commit a violent crime, and are actually very likely to become a
victim. The idea that people with mental illness are dangerous is not evidence-based and creates a lot of unnecessary stigma, so I appreciate your effort to dispel that myth.
However, on that Mayo Clinic page that I linked, scroll down to the "Cluster B" list: Histrionic, Antisocial, Borderline, and Narcissistic. If you read the diagnostic criteria for Antisocial and Narcissistic, you will see why many of us who have gone to school for mental-health-related fields, dealt with these folks in our personal lives, or just read wayyyyyyy too many of these true crime cases, think that criminals like CW and SP fit the bill, and why it makes sense to look for these qualities in a potential perp. The experts who wrote the books I listed above estimate that 10% of the population
does not have the capacity to feel empathy or remorse. Not sure why you think people find that comforting, for me it's completely terrifying, and it's totally evidence-based and backed up by people who've spent entire psychiatric and mental health research careers studying this stuff. Not to mention, NPD/ASPD are almost impossible to treat, in no small part because their disorder leads them to believe there is nothing wrong with them and everybody else is always to blame.
Edited for atrocious grammar.