> "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
Hangul is an exception to many similar "historically true" patterns mostly because it was created so late. Hangul is more a single person's well-educated effort, not something that emerged over time from various local customs. The castle I grew up near is easily 150+ years older than Hangul.
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