Jürg Willi a doctor, a specialist in Psychiatry and Psychotherapy. He was director of the Psychiatric Polyclinic University Hospital Zurich, Professor of Psychiatry Ambulatory cash, Psychotherapy and Psychosomatic Diseases. Currently heads the Institute for Ecological-Systemic Therapy in Zurich. Willi was the first to introduce the therapy of partner in the German speaking area. His publications include especially the work the human couple (Madrid, 2002), which until now has been translated into more than ten languages and has had worldwide impact.