Attachment theory, the brainchild of child psychiatrist and psychoanalysis John Bowlby, has begun to have a worldwide impact among clinicians since 1990. This interest makes a departure from the early fate of attachment theory. At first shunned by the psychoanalytic community, Bowlby's effort to recast basic psychoanalytic concepts within systems theory and a new, ethologically based model of the importance of affectional ties across the life span was taken up by a group of developmental researchers. Empirical research was not only tested and confirmed many basic propositions of attachment theory, but also extended attachment theory in unexpected and creative ways. Bowlby was surprised and gratified by this turn of events, but also disappointed that his intended clinical audience had not taken the theory and run with it. This text is in part a testament to the fact that clinicians are beginning to do just that: they are taking the attachment theory and research creatively to examine clinical issues. In doing so, new vistas and hypotheses are being put forward showing that attachment theory is alive and well. In this volume, the editors gather a distinguished group of clinician-scholars from around the world to examine and extend Bowlby's legacy.