 So, like Spinoza, Leibniz will have to provide a theory of consciousness in terms of representations, and, perhaps unlike Spinoza, he will have to demonstrate how this theory allows for transitions from conscious to non-conscious states. If he can do this, then, he thinks, his theory of mind will avoid many of the problems plaguing the Cartesian theory of mind. Further, he thinks it will be a fully natural theory, one that will open up a new science of the mind, which he calls pneumatology (cf. RB 56; the name pneumatology obviously didn’t catch on, but the science Leibniz envisioned would probably overlap significantly with today’s cognitive  sciences).[15] 