For the average person that has not dealt with a psychopath, nor read or educated themselves on the subject, it would be literally impossible to spot a psychopath even if they live under the same roof.
I don't think they really don't know, they just don't have a name for it. It's one thing to know a person you're dealing with is an extreme as...ole and the other knowing that he has no conscience and is basically as good as a serial killer. Finding a name for it and know what you're dealing with is the most important.
I totally agree, and this is what I wanted to point out. You know something is severely wrong with the person but just don't have the exact answer/label/diagnose, and you need a psychiatrist's opinion to actually KNOW you're dealing with a Psychopath.
I was wrong, I thought my brother has Bipolar II disorder or Borderline Personality Disorder (BPD) for years, I was dead wrong, but the bulb lit up when I saw the diagnose written on paper and only then I was able to go research a bit more and put all the pieces of the puzzle together.
There are thousands/millions of abused women worldwide, that don't even have a clue that their husbands are psychopaths, they don't even have the slightest clue they have a mental disorder, they purely believe that they are abusers and that's the end of the story. I am a member in two Domestic Abuse communities and can tell. Many victims have got NO clue that they're dealing with people without a conscience.
Xe