Giorgio Nardone graduated at the University of Siena, faculty of Education, with a thesis on philosophy of science. Subsequently, he conducted a research project on the epistemology of clinical psychology and of the various psychotherapy models, as an assistant to the Chair of Professor Mariano Bianca. In this work, he analysed the epistemological criteria of the different models of psychotherapy. He immediately realised that the only model among all that could stand up to this close examination was the one of the School of Palo Alto, that is, the works produced by the group of the Mental Research Institute in Palo Alto, California. In fact, the researchers of this Institute, leaded by Don. D. Jackson, formulated a model of “interactional” therapy based on the study of the effects of communication on behaviour and on mental health of human beings. Later, Paul Watzlawick developed a real theory on pragmatics of communication and change (Watzlawick et al., 1967, Watzlawick et al., 1974) along with a corresponding therapeutic intervention model applicable to a variety of mental disorders…