Evidence regarding the role of attachment in personality development has been accumulating apace during the 1980s. Earlier findings have been replicated on samples of diverse origin; methods of observation have been refined and new methods introduced; and the role of easy two-way communication between parent and child in making for healthy emotional development has been emphasized. Since I believe this new work to have far-reaching clinical implications, my aim in this lecture has been to present a review of these findings in a form suited to those working as psychotherapists in the mental health field.