I think it would be really cool if The Mandela Catalogue incorporates the theory of the bicameral mind
Some of you have probably seen this pretty popular video about said theory from a few months ago and the whole time I was watching it it sounded so MC to me. The general concept is that before The Bronze Age collapse humans were unconscious and didn't perceive of their inner thoughts as being their own, but as coming from some divine outside source, giving them guidance and commands. Around the 13th-12th century however these "gods" that people were hearing in their heads suddenly disappeared and would no longer speak to them, causing distraught and civil unrest.
The 2nd and 3rd images are from a 13th century babylonian tablet in which a nobleman describes his gods disappearing and his desperate attempts to bring them back, and the last image is a depiction of the Mesopotamian king Tukulti praying to an empty throne for the gods to return.
This whole concept of a mindless world where everyone just follows the words of "gods" in their heads sounds really unnerving to me and the language and imagery of people desperately trying to bring back those voices of "gods" remind me a lot of Mark's writing where he feels like he's been abandoned by God. I can definitely imagine some Mandela Catalogue explanation for this theory where Gabriel is the one behind all of this.