Attachment
Attachment describes the deep emotional bond that forms between a child and a primary caregiver — and, crucially, the enduring template that bond creates for how a person relates to closeness, distance, and emotional need throughout life. Developed by John Bowlby and extended to adult relationships by researchers Hazan and Shaver, attachment theory is not a personality taxonomy but a map of learned strategies.
The four broad patterns — secure, anxious, avoidant, and disorganized — describe how the nervous system learned to manage closeness in its earliest environment. What the framework makes possible is not diagnosis but cartography: a way of seeing which routes you habitually take toward and away from intimacy, and why those routes were originally the most adaptive ones available.
The important addendum: attachment patterns are not fixed. The research on "earned security" — people who began with insecure patterns and developed secure functioning through therapy, significant relationships, and conscious work — is clear and worth holding close.