The word "spiritualism" would seem to refer to spirits, often thought of as some form of intelligence outside of matter, or at least outside of our understanding of matter. It's entirely possible to make a case for something that could be called "spirits" without resorting to any supernatural claims. Not proof of course, just a reasonable case.I know I'm going to regret asking this, but can you give me an example of "some form of intelligence outside of matter, or at least outside our understanding of matter... without resorting to any supernatural claims"? I can't think of any right of the top. To hopefully avoid any confusion, when I say "spiritual", I'm not referring at all to "spiritualism", which is something different. I'm talking about things that relate only to the mind, things that "inspire". There is nothing supernatural about that.