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Mismatch: Why Relationships Break Down, How to Rebuild Them, and Whether There Is a Solution
Paperback
Publisher Price: $35.00
ISBN13: 9781764834803
Publisher: Keystone Therapy
Published: Aug 10 2026
Pages: 116
Weight: 0.36
Height: 0.24 Width: 6.00 Depth: 9.00
Language: English
Relationships are breaking down across Australia and the developed world - and the standard explanations no longer hold up. It's not primarily a failure of communication, commitment, or character. It's a structural mismatch.
Drawing on evolutionary biology, neuroscience, attachment theory, and more than thirty years of clinical practice, Dr Steve Halls argues that the human nervous system was never designed for the environment it's now asked to sustain intimate partnership within. Pair bonds evolved inside small, stable, communally-regulated groups - never as the sole source of co-regulation for another human being. Contemporary life has stripped away that communal scaffolding entirely, leaving partners to carry a neurobiological load their relationship was never built to bear alone.
MISMATCH moves through three parts. Part One descends beneath the behavioural surface of relational breakdown into the neurobiology of allostatic load, polyvagal collapse, attachment architecture, and the Gottman Four Horsemen - reframing familiar conflict patterns as autonomic states rather than character flaws. Part Two offers a sequenced, evidence-based clinical framework - the ARCHR model (Allostatic state, Relational Ziggurat tier, Conflict pattern, attachment History, and Repair capacity) - for rebuilding regulation, co-regulation, attachment security, and relational meaning, in that order, because skipping straight to communication skills with a dysregulated nervous system rarely works. Part Three confronts the hardest question of all: genetic evolution can't keep pace, individual neuroplasticity is real but bounded - so is there an actual solution, or only better-managed distress? The answer runs through conscious niche construction and cultural redesign, arriving at something more durable than optimism.
Grounded throughout in Australian epidemiological data - cost-of-living pressure now the leading driver of relationship strain, and the sobering finding that over one in five suicides among young Australian men follow relationship breakdown within a year - MISMATCH treats this as the public health issue it actually is.
Rigorously sourced, clinically actionable, and genuinely hopeful without being naïve, MISMATCH is essential reading for clinicians, researchers, and anyone trying to understand why modern love is so hard - and what can actually be done about it.
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