Roberto Assagioli (Venice, February 27, 1888 – Capolona, ​​August 23, 1974) was an Italian pioneer of transpersonal psychology and psychotherapy. He was a doctor, psychiatrist and psychotherapist and founder of psychosynthesis, a model of human nature, covering the mind and soul. This laid the foundation for the therapeutic psychosynthesis, but is also used in pedagogics, social sphere, in the field of personal development and in interpersonal relations. Psychosynthesis serves as an important basis for the development of humanistic and transpersonal psychology and psychotherapy.