Unus mundus

Unus mundus, lit. "One world", is a term which refers to the concept of an underlying unified reality from which everything emerges and returns to. It was popularized by Swiss psychoanalyst Carl Gustav Jung, though the term was used as early as the 16th century by Gerhard Dorn, a student of the famous alchemist Paracelsus.

Jung's concepts of the archetype and synchronicity are related to the unus mundus, the archetype being an expression of unus mundus; synchronicity, or "meaningful coincidence", being made possible by the fact that both the observer and connected event ultimately stem from the same source, the unus mundus.