I really believe that Jamaica saw such a musical explosion (and continued cultural dominance) because of the "human" view of music creation. So much was about borrowing or reusing or repurposing. Lyrics subtly changed from other songs. Reusing melodies from other songs. Purposely having multiple artists do their take on "riddims" to make the song their own. It let anyone contribute and it increased the amount of creative production, not reduced it. And, what do we get out of subtle modifications and copying of previous tunes? A genre.