Carl Gustav Jung (1875–1961) was a Swiss psychiatrist and psychoanalyst who founded analytical psychology. Jung was a contemporary of Sigmid Freud and initially worked with him in exploring the unconscious mind. However, he later diverged from Freud's ideas, developing his own concepts such as the collective unconscious, archetypes, and individuation. Jung's work emphasizes the importance of the individual psyche and the personal quest for wholeness. His theories have influenced not just psychology, but also philosophy, religion, literature, and the arts. Jung introduced several psychological concepts that have gained widespread recognition, such as introversion and extraversion, and his work has contributed significantly to our understanding of the human mind and behavior.