Maté, drawing on his own diagnosis and clinical practice, argues that attention deficit disorder is best understood as a developmental outcome shaped by the quality of early attachment relationships rather than a fixed genetic defect that simply "happens" to a child.

Why attachment matters more than the genetic story most people hear:

• Genes may set a predisposition, but Maté argues they only become expressed as ADD in the presence of chronic early stress, disrupted bonding, or a parent's own unresolved emotional unavailability
• The infant brain's attention and self-regulation circuits mature in direct response to the attunement of a caregiver, so gaps in that attunement leave measurable gaps in those circuits
• This reframing shifts the question from "what's wrong with this brain" to "what happened to this relationship," which changes what healing looks like

Understanding ADD as relational rather than purely biological doesn't deny the biology — it explains why medication alone rarely resolves the whole picture, and sets up the book's case for relationship-centered healing.