I was reminded this week of the trauma to a family when a member has a personality disorder (sociopath, as far as we know) - it isn't treatable with a drug, it's something that might be improved by therapy and practice of social skills, etc. (So a psychologist friend told me recently.) A sibling has those characteristics and while his anti-social behavior (toward the family in particular) was so difficult for all of us for many years, it is peaceful since no one has heard from him in ~15 years. He seems to have a roof over his head and figured out a disability income. Someone asked me if I wanted to revisit the issues in that case - no way. Leave well enough alone.