Jung was the first to use the term collective unconscious as a means for describing an expression of the unconscious that is exhibited by every living being with a nervous system. Rather than only possessing experiences from our personal history or our psyche, the collective unconscious organizes all of the experiences within a species. Jung believed the collective unconscious was inherited and inherent to each being, rather than a result of specific events. The collective unconscious holds mental images that cannot be explained historically or through experience, but exist only as an evolutionary by-product.