Carl Jung's theory is the collective unconscious. He believed that human beings are connected to each other and their ancestors through a shared set of experiences. We use this collective consciousness to give meaning to the world.
Jung proposed and developed the concepts of the extraverted and the introverted personality, archetypes, and the collective unconscious. His work has been influential in psychiatry and in the study of religion, literature, and related fields.
What people go through is a process of growing up and becoming an individual, that repeats patterns that are found in myths and legends. You are on a quest, as ancient heroes were. At least, that's as I understand it.
