• Darwin speculated that “music tones and rhythms were used by our half-human ancestors, during the season of courtship, when animals of all kinds are excited not only by love, but by strong passions of jealousy, rivalry, and triumph” and that speech arose, secondarily, from this primal music.

    "Musicophilia: Tales of Music and the Brain". Book by Oliver Sacks, October 16, 2007.