Basically, it would become a fascinating aspect of this thread if we could come up with definitive precursors of a comprehensive theory of symmetric chord building, be it by some 'universals of music' by Bruno Nettl or by ideas by Jonathan Harvey already explored in his own compositional work.
@ Antiatonality:
Nettl's Study of Ethnomusicology seems to be a very detailed book as it is, after its first publication in 1983, an expanded and revised second edition (2005). What kind of (three) universal truths about music do you see, AA, in Nettl's book? IMHO, vertical sound building wouldn't count for that, but horizontal melody/rhythm progression would do. Or should we now, after a long period of music history and associated research in musicology, and in ethnomusicology in particular, include multi-voiced sound building as a universal of music?
@ Nathaniel Near:
Jonathan Harvey's 'In Quest of Spirit: Thoughts on Music' is another case. This book of about hundred pages has even a chapter reprinted under Google Books, i.e. "2. The Role of Ambiguity". If you, NN, could guide me a bit so see where he deals with the topic of chord building? Or even better, if you could talk a bit about your own research and analysis, this would be great for me to reflect on.
Seems to become a promising road to go.