Psychosynthesis is an inclusive approach to human growth that dates from 1910 and the early work of the Italian Psychiatrist Roberto Assagioli. Assagioli was one of the pioneers of Freud's psychoanalysis in Italy, but he maintained that Freud had not given sufficient weight to the "higher" aspects of the human personality. Assagioli recognized a need for a more inclusive concept of humanity and a system (which he called Psychosynthesis) that would help humans come together within themselves as well as with each other and their world.

From this beginning Assagioli – and an increasing number of psychotherapists, educators, physicians, social workers, clergy, and others – worked to develop and refine this inclusive view of human growth. It is an exciting task that continues today – and will never to be finished. Each year, new discoveries in psychology, new developments in education, religion, anthropology, physics and other disciplines, add to the principles and to the techniques of Psychosynthesis. Psychosynthesis, by its very nature, is always open to new approaches to human development.