Melanie Klein has been one of the most important contributors to our thinking about human development and human personality. In this classic text, Isca Salzberger-Wittenberg demonstates through theoretical exposition and the use of case material the ways in which Melanie Klein's main concepts and theories illuminate the practice of social casework. These theories are often complex and controversial, but this concise and lucid account continues to enable social workers and others in helping professions to judge the relevance of the Kleinian approach for themselves.