"Attachment is a deep and enduring emotional bond that connects one person to another across time and space" (Ainsworth, 1973; Bowlby 1969)
Specifically, attachment theory looks at the trust that develops between an infant and child and the primary caregiver as the basis for a child's emotional and social development.
When a child experiences trauma in the form of physical and emotional neglect, and/or physical and/or sexual abuse, a disruption in secure attachment occurs. As a result, an insecure attachment pattern occurs that results in unhealthy thoughts and perceptions of the self and others, and an inability to regulate emotions in a healthy way. These, in turn, result in self-destructive behaviors such as substance abuse and other addictions, and insecure attachment and relationship problems as adults. The cycle continues with maladaptive parenting as adults based on their own mistreatment as children.