Have now eaten so I hope no more of the embarrassing spelling mistakes which are so obvious in my last posting.
Jeri, a more simple explanation would be that people ,unconsciously or otherwise, always immitate success.
The similarity with "Devil gate drive." may simply be the consequence
of a writer studying how another writer puts together a song in order to see how it's done.
This was common practice during the greatest period of classical composition.
Borrowed metres are commonplace in all sung music.
A good example is that the words to "Rock of ages ","Clementine" & "La Cucaracha" can all be sung to each others melodies.
This is also the case with "House of the rising sun" & "Oh little town of Bethlehem" (Try it)
Also bear in mind that all the civilisations you mention in your example were known to each other.
Where this leads is apparent in an example like "Twist & Shout"
The Beatles version was their interpretation of a song recorded by The Isley Brothers who's chord changes were adapted from La Bamba which was introduced into The U.S. from Mexico.It was introduced into Mexico by The Spanish who ,allegedly,borrowed it from The Portuguese who may have taken it from elsewhere for all I know.
Ultimately it's all about Human interaction rather than Mysticism.