Like many psychological theories, I think this is un-falsfiable so I am hesitant to label some of Freud and Jung's ideas science and sound more like philosophy.
The collective unconscious sounds A LOT like the Will to Life from Arthur Schopenhauer's ideas. I don't think it's quite "collective" in a spiritually liked way, but more like similar due to us all being human, and our biology all being the same. If our conscious minds are due to experience, and the unconscious shaped more by human nature ( as well as memories being repressed into it ) that seems to be the result of genetics.
The collective unconscious sounds A LOT like the Will to Life from Arthur Schopenhauer's ideas. I don't think it's quite "collective" in a spiritually liked way, but more like similar due to us all being human, and our biology all being the same. If our conscious minds are due to experience, and the unconscious shaped more by human nature ( as well as memories being repressed into it ) that seems to be the result of genetics.