Psychopaths are reptiles and don't understand humans.
Sociopaths are reptiles that know they are reptiles and use mimicry with humans to get what they want.
Narcissists are Sociopaths that only feel one emotion, love of themselves.
Then there are those who know they can become monsters to protect their loved ones, They just wanted to be allowed to pursue life and happiness. They do not get PTSD, But they will deliver PTSD to those who come against them.
The precipice will be the unleashing via an overt attack on these the warriors.