Everyone has probably heard that in ASPD there are widely considered to exist two models
(1) Psychopaths. Normal upbringing, but due to presumed genetics and different brain structures they exhibit behaviors conforming to the "Psychopathy Checklist."
(2) Sociopaths. Forced by circumstance to grow up within poor environments, ones that make antisocial and criminal behavior adaptive. Otherwise, their genetic inheritance and brain structure are within the normal range of variation.
Of course this is a simplification, in order to clearly illustrate main causes due to "nature" or "nurture;" in reality, both nature and nurture play some unknown part in most people's final expression of personality.
But this all got me thinking: since other Cluster B disorders share many things in common, might the other disorders also have two different subclasses of causality? So we could have an HPD person whose disorder is due more to inheritance, and another whose origin is due more to family environments.
HPDs in whom it is more nature: "Endohistrionic;" those from nature: "Exohistrionic."
And, as I stated before, the majority of HPD origins being due to both nature and nurture, in whatever fraction: "Ambihistrionic."