I recently read an article about the latest evidence supporting panpsychism, the theory that the entire world is conscious. The findings were from a study of dissociative (multiple) personalities. I was also re-reading Jung and found this sentence: “But even the soberest formulation of the phenomenology of complexes cannot get round the impressive fact of their autonomy, and the deeper one penetrates into their nature – I might almost say into their biology – the more clearly do they reveal their character as splinter psyches.”
So, the biology of what creates our psyches (the brain, etc.) is inclined to produce many different psyches. 
If you read the article linked above on the word “article,” you will see that the scientists proposed the theory that each of us (and literally everything) is a separate personality of the universal consciousness.
A while ago I saw a video of Thomas Moore, a “creation theologian.” In it, he noted that the only thing we know about consciousness is that living things have it. But we know living things are carbon-based. So by the transitive property, how do we know it is not carbon that thinks? 