I was musing about various Asian singing traditions, which, to my knowledge, don't include harmony singing. That's what got me started on this question. In some cultures people sang together, or in call and return, or in note combinations that sound atonal to western ears, but not in harmony. Harmony seems like such a simple concept and it is so pleasing to the ear that I'm wondering why it didn't take hold universally. I'm not anywhere near being an expert on musicology or music history, so I thought some of y'all who know lots more than me might have some thoughts or knowledge.

elmer