Carl Jung was a Swiss psychiatrist who founded analytical psychology. Some key points of his theory include:
1) He proposed the collective unconscious - a reservoir of experiences shared by humanity that influences our behaviors and emotions. It contains archetypes - innate tendencies to experience things in certain ways.
2) Major archetypes include the mother, representing nurturing relationships, and the shadow, representing repressed desires and the "dark side" of humanity.
3) Dreams, myths, and spiritual experiences across cultures provide evidence of the collective unconscious and archetypes. Near-death experiences in particular suggest we are "built" to experience death in similar ways.
4) Jung diverged from Freud by arguing archetypes