Attachment theorists have long recognized that multiple attachments characterize the typical experience of most children. But an appreciation of attachment networks is new, and this commentary draws on some of the most theoretically provocative themes of the contributions to this special issue. These include: how the quality of attachment relationships and the contexts of their development colors the security derived from them and the developmental outcomes they influence; the impact of relationships on other relationships in the attachment network; and the multiple ways attachment theory can influence public policy for children and families.