The black keys represent the minor pentatonic scale in Eb and there's something fundamental about that scale that transcends cultures. You can hear that same scale being played in all kinds of indigenous music, from Native American to Irish to Chinese to Greek and African. It's also the foundation of the blues, which I think of as like our own native "folk" music in America. If you sit down at a piano you can use those black keys to play tunes that would sound at home anywhere in the world.
Music starts to differentiate itself once a culture reaches a certain level of sophistication, which leads to the harmonic variety in European music, the complex rhythms of African and Caribbean music and the microtonal melodies of Middle Eastern music. But it all springs from that pentatonic root, which I think is powerful proof that music is a universal language and blessing from God.
