Instrumentals, or songs that are predominantly instrumental, have always been among my favorite "healing" music. Just listening to the instruments in rhythm makes me feel good. ...
I like the instrumental "Jessica" by The Allman Brothers Band. It is said that the composer, Dickey Betts, was inspired to write the melody by watching his infant daughter, Jessica, bounce around the room.
I like "Jessica" as well, thanks!
In truth, my favorite Allman Brothers Band instrumental (somewhat more melancholy than "Jessica", so perhaps not a good "heal the world" song ) is "In Memory of Elizabeth Reed". I would play the latter during my jazz shows on my college radio station, and invariably would get a call from at least one listener who has shocked when they found out it was by the Allman Brothers .
This song - this version always heals me. I think it could heal the World.