Bowlby's (1969/1982) attachment theory has inspired decades of empirical work focusing on antecedents and consequences of variation in attachment security across the lifespan. However, significant questions remain about individual differences in adult attachment and their developmental origins. This book address these issues, reporting analyses based on Adult Attachment Interviews (AAIs; Main, Kaplan, & Cassidy, 1985) collected at age 18 years from the largest longitudinal sample of its kind (N = 857)--participants who had been enrolled in the NICHD Study of Early Child Care and Youth...