"It is a comforting fiction to segregate psychopaths as the other 1% of an abstract population, who live over there. Psychopathic potential resides in every human soul"

I am not sure I agree with this. Psychopaths are more hereditary i.e. they are born psychopaths, there is a genetic component. Normal people who suffer through a difficult environment are more likely to become sociopaths or develop narcissistic personality disorder as a coping mechanism. Such people can be as destructive as psychopaths and as incurable.

Surprisingly, group therapy can socialize some NPD people so they are not beyond hope. However treatment of psychopaths and sociopaths often just teaches them new manipulation skills and further heightens their capacity to do wrong. Thereby treatment merely makes them them more dangerous and thus, treatment is worse than a waste of time. Hence banishment or execution to remove them from the gene pool are valid considerations.

Sociopaths can form bonds with people they are close to and can feel guilt if they harm these people. A person who has lived through a difficult life and developed sociopathic tendencies might have a chance of being socialized, if intervention happens early enough. However if this person reaches the age of 25 to 30, socialization may never be possible.