Splitting occupies a foundational position in the depth-psychological corpus, operating simultaneously as a primitive defence mechanism, a developmental necessity, and a pathological fixation. Melanie Klein provides the most theoretically elaborated account: in the paranoid-schizoid position, the nascent ego actively splits both object and self into good and bad components, a process inseparable from projective identification and the management of persecutory anxiety. For Klein, splitting is not merely pathological but constitutive of early psychic life, becoming problematic only when it persists with excessive rigidity and prevents the integration characteristic of the depressive position. Laurence Heller, working within developmental trauma frameworks, extends this logic to somatic and relational registers: splitting is fueled by the child's need to preserve attachment bonds by segregating aggression from love, and its resolution requires reclaiming disowned anger. Lisa Najavits applies the concept clinically to PTSD and substance abuse, where distinct ego-states alternate in a Jekyll-and-Hyde structure. Donald Kalsched, from an archetypal-Jungian vantage, frames splitting through dissociation driven by traumatic complexes. The I Ching tradition, represented across multiple translators, offers a cosmological counterpart in Hexagram 23 (Po/Splitting Apart), where structural disintegration precedes cyclical renewal. Across these registers, the critical tension is between splitting as adaptive defence and splitting as the obstruction of integration — the very dialectic that organises depth-psychological therapeutics.
In the library
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the ego is incapable of splitting the object—internal and external—without a corresponding splitting taking place within the ego. Therefore the phantasies and feelings about the state of the internal object vitally influence the structure of the ego.
Klein articulates the structural reciprocity of object-splitting and ego-splitting, establishing the mechanism as simultaneously intrapsychic and object-relational at the core of early development.
Klein, Melanie, Envy and Gratitude and Other Works 1946-1963, 1957thesis
in the splitting-off of frightening figures defusion seems to be in the ascendant; whereas superego formation is carried out with a predominance of fusion of the two instincts.
Klein distinguishes two qualitatively different modes of splitting — the pathological splitting-off of terrifying internal objects versus the integrative splitting involved in superego formation — revealing a hierarchy within splitting processes themselves.
Klein, Melanie, Envy and Gratitude and Other Works 1946-1963, 1957thesis
splitting is fueled by the need of abused and neglected children to keep their attachment system int... as his splitting resolved, and as he owned and integrated his aggression his chronic fearfulness greatly diminished.
Heller demonstrates that developmental splitting preserves attachment at the cost of disowning aggression, and that its resolution — the reintegration of split-off anger — directly reduces chronic anxiety.
Laurence Heller, Ph D, Healing Developmental Trauma How Early Trauma Affectsthesis
the ego's capacity to achieve integration is naturally still very limited and to this contributes the strength of persecutory anxiety and of the splitting processes which are at their height.
Klein establishes splitting as developmentally normative in early infancy, its intensity modulated by persecutory anxiety and gradually attenuated as integrative capacity matures.
Klein, Melanie, Envy and Gratitude and Other Works 1946-1963, 1957thesis
destructive impulses on the one hand, and love and the need to make reparation on the other, are contradictory. But the ego at its best is capable of acknowledging these different aspects and bringing them closer together, whereas they had been strongly split off in infancy.
Klein frames ego integration as the mature achievement of holding together what had been split in infancy, with reparation as the affective bridge across the original cleavage.
Klein, Melanie, Envy and Gratitude and Other Works 1946-1963, 1957supporting
PTSD and substance abuse are rare among psychological disorders in that both are marked by 'splitting.' That is, one's internal world may have different states of consciousness that arise at different times.
Najavits extends the concept of splitting to clinical syndromes of PTSD and substance abuse, framing it as alternating ego-states that must be identified and integrated for recovery.
Najavits, Lisa M., Seeking Safety: A Treatment Manual for PTSD and Substance Abuse, 2002thesis
It is natural to react to an inadequately supportive or threatening environment with increasingly aggressive strategies: first protest, then anger, and finally, when those are not successful, rage.
Heller locates the genesis of splitting in the infant's progressive thwarting of aggressive protest, providing a developmental-somatic account of how splitting is inducted by environmental failure.
Laurence Heller, Ph D, Healing Developmental Trauma How Early Trauma Affectssupporting
projective processes connected with splitting, for which she introduces the term 'projective identification', a concept discussed below.
This editorial note situates splitting as the precondition for projective identification, marking Klein's 1946 paper as the theoretical origin of both concepts within the paranoid-schizoid position.
Klein, Melanie, Envy and Gratitude and Other Works 1946-1963, 1957supporting
the primary splitting processes are too violent, at a later stage integration and synthesis of objects are impeded and the depressive position cannot be worked through sufficiently.
Klein argues that excessive early splitting constitutes a structural obstacle to depressive-position working-through, linking the intensity of primitive splitting to later psychopathology.
Klein, Melanie, Envy and Gratitude and Other Works 1946-1963, 1957supporting
a traumatic complex brings about dissociation of the psyche. The complex is not under the control of the will and for this reason it possesses the quality of psychic autonomy.
Kalsched, drawing on Jung, frames trauma-induced dissociation as a form of splitting that grants complexes autonomous agency, connecting the mechanism to archetypal defence of the personal spirit.
Kalsched, Donald, The Inner World of Trauma: Archetypal Defences of the Personal Spirit, 1996supporting
Fairbairn's approach was largely from the angle of ego-development in relation to objects, while mine was predominantly from the angle of anxieties and their vicissitudes.
Klein situates her theory of splitting in relation to Fairbairn's object-relational account of schizoid phenomena, clarifying that her emphasis falls on anxiety dynamics rather than ego structure alone.
Klein, Melanie, Envy and Gratitude and Other Works 1946-1963, 1957supporting
SPLITTING APART. It does not further one To go anywhere... This pictures a time when inferior people are pushing forward and are about to crowd out the few remaining strong and superior men.
The I Ching's Hexagram 23 furnishes a cosmological register for splitting as structural dissolution, wherein the ascendant yin principle erodes the yang, counselling stillness rather than reactive intervention.
Richard Wilhelm, Cary F. Baynes, The I Ching or Book of Changes, 1950supporting
SPLITTING APART means ruin. The yielding changes the firm... The superior man takes heed of the alternation of increase and decrease, fullness and emptiness; for it is the course of heaven.
Wilhelm's rendering of Hexagram 23 encodes splitting as a cyclical phase of cosmic disintegration governed by natural law, embedding the concept within a dialectic of dissolution and renewal.
Wilhelm, Richard, The I Ching or Book of Changes, 1950supporting
although our personality has 'split apart' through reacting to fear, relinquishing the fear will cause the splitting apart to end.
Anthony applies the I Ching's Hexagram 23 psychologically, reading 'splitting apart' as a personality fragmentation caused by fear that is reversible through relinquishment of reactive stances.
Carol K. Anthony, A Guide to the I Ching, 1988aside
Even to contemplate intervention is to 'split apart' from our path. When we split from our true path, we turn matters over to the Inferior Man and the inferiors.
Anthony uses 'splitting apart' as a moral-psychological category denoting deviation from authentic orientation, aligning it with the surrender of inner authority to inferior impulses.
Carol K. Anthony, A Guide to the I Ching, 1988aside