Borderline personality organization is a level of severity, between neurotic and psychotic, not a diagnosis: BPD is only one kind within it. Its core is splitting, identity diffusion, primitive defenses and trouble holding good and bad together in relationships, and knowing a patient's level matters more than knowing their dynamics.
What it is
Borderline began as a level of personality organization: not ill enough to be psychotic, more ill than neurotic, a mid-level severity of personality problems. People in this range are medium in their ability to connect to themselves and others and to regulate emotions.
“the borderline range is people who are somewhere in the middle they've got characteristics Both, they're basically medium level in terms of their ability to connect to themselves, others, and regulate emotions”
24:45Is Psychoanalysis Still Relevant in Modern Psychiatry?Oct 2025 Also said in 1 more episode
“borderline... originated as the idea of a kind of personality organization, not crazy enough to be psychotic, but crazier than neurotic. So in other words, it was a mid-level kind of level of severity of personality problems”
8:38Nancy McWilliams on Psychoanalytic Diagnoses, Part 1: Personality, Defenses, Themes, Paranoid PersonalityNov 2024Guest episode It is not the same as borderline personality disorder. BPD as people talk about it is only one category within borderline personality organization, which also includes narcissistic, antisocial, histrionic and other types.
“borderline personality disorder, as people popularly talk about, is only one category within the organization, borderline personality organization, which would include things like narcissistic, antisocial, histrionic, and other types”
22:07You Can See Everything Psychological Analysis by Clinical & Forensic PsychiatristsOct 2026 Following Kernberg, it is much more important to know what level the person is at than what their dynamics are.
“Kernberg in 1984 talked about how it's much more important to know what level the person is at than what their dynamics are”
21:10Nancy McWilliams on Psychoanalytic Diagnoses, Part 1: Personality, Defenses, Themes, Paranoid PersonalityNov 2024Guest episode Put simply, it is stunted, slowed or difficult interpersonal and emotional development: how we understand and feel about ourselves, our relationships and other people.
“it's a stunted or slowed or difficult emotional development, interpersonal and emotional development, how to understand ourselves and feel about ourselves and about our relationships and other people”
28:21You Can See Everything Psychological Analysis by Clinical & Forensic PsychiatristsOct 2026
Core features
Identity diffusion and a reliance on primitive defenses. The big difficulty is integrating the positive and negative aspects of relationships.
“Other characteristics with BPO are identity diffusion, a reliance on primitive defenses. Really, the big difficulty is difficulty integrating positive and negative aspects of relationships”
27:53You Can See Everything Psychological Analysis by Clinical & Forensic PsychiatristsOct 2026 Children learn through a series of minor, chronic frustrations that the all-good mother and the all-bad mother are the same person. Splitting develops when that process is interrupted.
“through a series of minor chronic frustrations that improve your ability to understand that the all good mom and the all bad mom are the exact same thing. So splitting develops when that process is interrupted”
24:50You Can See Everything Psychological Analysis by Clinical & Forensic PsychiatristsOct 2026 Idealization and devaluation are very human and we all do them. What sets this level apart is the degree.
“idealization and devaluation is very human and we all do it. That's not the unique part. I think it's the degree and how it seems to be”
45:04You Can See Everything Psychological Analysis by Clinical & Forensic PsychiatristsOct 2026
How it shows up
Poor self-other boundaries can sound like someone feeling they could write for their partner.
“Well, I typed it, but basically I could write for her. There really is a really poor self in other boundaries. And with regards to what I was saying with the idealization”
46:19You Can See Everything Psychological Analysis by Clinical & Forensic PsychiatristsOct 2026 When we adopt something from someone we look up to, we do not wholesale steal what they do.
“When I adopt someone else that I look up to, I don't wholesale steal what they do. I sort I haven't started talking like Dr. Fu”
50:37You Can See Everything Psychological Analysis by Clinical & Forensic PsychiatristsOct 2026
Across the spectrum
Toward the borderline and psychotic end of the hysterical spectrum, you find sexual abuse in the histories of people with hysterical dynamics.
“Down toward the borderline and psychotic end of the spectrum, you find sexual abuse in the histories of people who have hysterical dynamics”
1:15:54Nancy McWilliams on Psychoanalytic Diagnoses, Part 2: Depressive Personality, Histrionic Personality, OCPDNov 2024Guest episode At the psychotic end, these patients create so much drama that you cannot get near psychotherapy; you do damage control all the time.
“at the psychotic end of the spectrum, they're creating so much drama all the time, you can't get near psychotherapy. You do damage control all the time”
1:22:22Nancy McWilliams on Psychoanalytic Diagnoses, Part 2: Depressive Personality, Histrionic Personality, OCPDNov 2024Guest episode
It also comes up on
- Alternative model for personality disordersWe prefer borderline personality organization and the alternative model, where we simply think in terms of impaired personality functioning.
- Borderline personality disorderWe prefer Kernberg's borderline personality organization and the DSM-5 alternative model to the traditional criteria: think in terms of impaired personality functioning.
- Personality disordersOne stronger view: the only things we should consider personality disorders are those that fit under borderline personality organization.
From these episodes
- You Can See Everything Psychological Analysis by Clinical & Forensic PsychiatristsOct 2026 · 7 points
- Is Psychoanalysis Still Relevant in Modern Psychiatry?Oct 2025 · 1 point
- Nancy McWilliams on Psychoanalytic Diagnoses, Part 2: Depressive Personality, Histrionic Personality, OCPDNov 2024 · 2 points
- Nancy McWilliams on Psychoanalytic Diagnoses, Part 1: Personality, Defenses, Themes, Paranoid PersonalityNov 2024 · 2 points
Every point above is something said on the Psychofarm podcast, with the words as spoken and a link to the moment in the episode. It is education, not medical advice, and an episode reflects what we thought when we recorded it.