"Third and finally, poetry originated as a form of vocal music. It began as a performative and auditory medium, linked to music and dance and associated with civic ceremony, religious ritual, and magic. (The earliest poetry almost certainly served a shamanistic function.) Most aboriginal cultures did not distinguish poetry from song because the arts were so interrelated as to be porous. Nor did the classical Greek or Chinese cultures two or three millennia ago differentiate poetry from song" (10).
Dana Gioia