---
category: Esoteric & Historical Concept
created: 2025-07-23
description: Synchronicity is a concept, first introduced by Carl Jung, referring
  to meaningful coincidences that lack a causal relationship but are deeply connected
  in meaning.
summary: Synchronicity is Carl Jung's concept of meaningful coincidences that lack
  causal connection, invoked in parapsychology research as a potential framework for
  understanding psychic phenomena that defy normal probability.
tags:
- concept
- psychology
- philosophy
title: Synchronicity
updated: 2025-07-23
---

[Synchronicity](/concepts/synchronicity/) is a concept first introduced by the Swiss psychiatrist Carl Jung. It refers to meaningful coincidences that lack a causal relationship but are deeply connected in meaning. Jung believed that synchronicity was an acausal connecting principle, a phenomenon where events in the external world mirror an individual's internal psychological state, suggesting a deeper, underlying order to the universe.[^1]

In the context of the *Phenomena* text, synchronicity is mentioned in relation to [Arthur Koestler](/people/arthur-koestler/)'s book *The Roots of Coincidence*, which explored Jung's concepts and their potential connection to [ESP](/concepts/extrasensory-perception/) and [Psychokinesis](/concepts/psychokinesis/). Major General [Edmund Thompson](/people/edmund-thompson/), a key supporter of the [Stargate Project](/programs/stargate-project/), developed an interest in psi phenomena after reading Koestler's book, suggesting that the idea of meaningful coincidences played a role in his openness to psychic research.[^1]

Synchronicity differs from mere coincidence in that it carries a profound personal meaning for the individual experiencing it, often feeling like a sign or a message. It suggests a connection between the inner and outer worlds that goes beyond conventional cause and effect, hinting at a collective unconscious or a universal field of information.[^1]

---

[^1]: Jacobsen, Annie. *Phenomena: The Secret History of the U.S. Government's Investigations into Extrasensory Perception and Psychokinesis*. Little, Brown and Company, 2017.