Good analysis.

My proposal for addressing these is to create a single introductory page with inline links to glossary definitions, and from there to further reading.

Also briefly explaining where the subjects connect to rationality. It's not immediately obvious what e.g. evolutionary biology or quantum physics have to do with human rationality, which probably puts people off. Actually, it's so not-obvious that I think it'd be easy to miss the point if one wasn't somewhat careful about making sure they read most of the posts in the sequence, or the ones explaining how everything's connected.