Attachment Theory is one of the most important theoretical developments in psychoanalysis to have emerged in the past half-century. It combines the rigorous scientific empiricism of ethology with the subjective insights of psychoanalysis, and has had an enormous impact in the fields of child development, social work, psychology, and psychiatry. This is the first known book to appear which brings together John Bowlby and post-Bowlbian research and shows how the findings of Attachment Theory can inform the practice of psychotherapy. It also provides fascinating insights into the history of the psychoanalytic movement and looks at the ways in which Attachment Theory can help in the understanding of society and its problems.