Is there some special reason to think that non-physical concreta can't -- or even probably wouldn't -- exist if theism weren't true? In particular, why think it's even slightly more likely than not that theism is true if, say, the mental or quasi-mental is a fundamental feature of concrete substances?
Just to be clear: The hypothesis on the table isn't that the mental supervenes upon or emerges from the physical. Rather, the hypothesis is that the mental or quasi-mental is part of the bedrock of concrete reality.
UPDATE: Here is a link to the SEP entry on neutral monism. It also includes helpful descriptions of somewhat similar views (e.g., panpsychism, dual aspect theory, neo-Russellianism, etc.). Non-physicalistic naturalist views of concreta such as these seem to me to pose one sort of problem for apologetical arguments from consciousness to theism.
Review of Draper and Schellenberg (eds.), <I>Renewing Philosophy of Religion: Exploratory Essays</I>
Adam Green reviews the book for NDPR.
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