Some of the works presented by the psychoanalyst Melanie Klein at the international congresses on psychiatry were entitled: “The Technique of Child Analysis”,“The Psychological Principles of Early Analysis”, and “An Obsessional Neurosis in a Six-Year-Old Girl”. Melanie Klein, who received constant support from her brother Emanuel, studied medicine in the field of psychiatry and founded the English School of Psychoanalysis.
Her most important work, entitled “The Psycho-analysis of Children”, discussed concepts of the paranoid-schizoid statethat develops in the first three months of life, relating to the basic instincts of love and hate, and the depressive state that develops at four months of age, when children feel they have hurt their mother through aggressive urges.