> "Dissociation from Birth" section sounds interesting until you learn that all alphabetic systems arose from a similar process, e.g. aleph was a drawing of an ox's head, etc.

My understanding of Korean (Hangul) is that the alphabet design is based on the shape of mouth in articulation, sonics, category, etc. of the letters themselves: https://en.wikipedia.org/wiki/Hangul#Letter_design

This is known generally as "featural writing system": https://en.wikipedia.org/wiki/Featural_writing_system