A very simple experiment one could make. Ok, ‘simple’ may not be the adequate term here, but let’s suppose you decide to have ten different children and you are wealthy enough to have an island of your own and you will raise these ten children without any contact with the external world and you will also teach them that your little island is the whole civilized world. You won’t give them any clue about other external cultures, you will create your own culture there, that will be your whole world. Do you think these children will “inherit” something from the collective unconscious, from the general collection of thoughts of humankind, passed from generation to generation and also from civilization to civilization or do you think these children will grow absolutely clueless about anything except what their father has taught them from their early days on?
This is a bold assumption. Whence does it come this notion that consciousness is fundamental? Consciousness may be an accident for all we know, just like life itself.
What you seem to be saying here is that the consciousness of all people on Earth represents a single process, and the union of all these consciousnesses is the substrate of the universe. But this is an unscientific perspective. If all the people and animals in the world simply disappeared today, there would be nothing left in the universe but an immense amount of dead matter. Without animals and humans, there is no consciousness. The planets where there is no life, the entire infinity of space in the universe where there is no life, there is no “consciousness” there organizing and managing things. The biggest hunk of the universe is simply “there”. It has no need of a consciousness. This is a phenomenon restricted to our planet and its living parts.
I insist that the experience of consciousness is individual and unique. I understand that the subconscious and the unconscious also exist, but as stages of the same process, and also related to an individualized brain and body. “Collective” consciousness is a step forward, very interesting from a philosophical-religious perspective, but without any more scientific basis than heaven or hell.