Musicians steal all the time. Chord progressions can’t be copyrighted, musicians often borrow a progression from a well-known song and put a new melody over the top of the chords. The uber-standard chord progression in the jazz world is “Rhythm Changes,” the chord changes from the Gershwin brothers’ tune “I Got Rhythm,” used in hundreds of songs, including The Flintstones theme.

Herbie Hancock stole a melodic idea for his hit album Headhunters (the super-hit song Watermelon Man–see below) from other master improvisers, improvisers not too many people know about: the Pygmy people (specifically, Mbuti Pygmies of Northeastern Zaire).