This is a stale and old debate, personality is extremely flexible and heavily depends on environmental and social constraints, as were demonstrated by seminal social experiment studies such as those of Milgram or Zimbardo. The argument that the changes seen there are short lived can be contradicted by the fact that subjects always go back to their normal environment after the experiment. What I believe Ed Boyden would call the illusion of isolation. That is why important changes usually occur at key breaking moments in a life: change of school, leaving home, changing city/country. The social environment has far more power on the psyche than any therapy. But the social environment of an individual usually do not change, and the only real power he has on it is to willingly chose isolation, which is worst of all. http://journals.sagepub.com/doi/full/10.1177/174569161456835...
Personality disorders, on the other hand, are characterised by fixed traits of personality, rigid in time in spite of detrimental effects on the life of the subject or the life of others.
Personality disorders, on the other hand, are characterised by fixed traits of personality, rigid in time in spite of detrimental effects on the life of the subject or the life of others.