The quest to create an evidence-based Social Work practice is emerging strongly in different fields of Social Work and social policy. In this volume internationally renowned proponents and opponents of this approach deliver profound analyses of the meaning and implications of an evidence based perspective which clearly challenges the nature of the knowledge base of the established Social Work practice and apparently reevaluates and reshapes the character of welfare professionalism. Aus dem Inhalt: What Knowledge? Evidence-based Practice, Profession and Users Organising, Measuring and Implementing Evidence Towards an Evidence-based Professionalism