Carl Gustav Jung was a Swiss psychologist who lived between 1875 and 1961. He is best known as the founder of complex psychology (i.e., analytical psychology) which is based on the idea that the human personality naturally aims toward psychic wholeness. While developing and refining his psychology, Jung introduced an entire lexicon of psychological terms that would eventually find widespread use in public discourse—extraversion, introversion, individuation, archetypes, for example. His ideas have influenced fields beyond psychology, to include the study of religion, mythology, literature and the humanities.