So if a genetic predisposition to music appeared early in human history, those who had it would have produced more healthy offspring who themselves reproduced. The most musical of those children would have the same advantage, and they would pass the music genes to their children, and so on, each generation benefiting from the gift of music. There are other evolutionary possibilities as well. Perhaps music was adaptive because it made us more attractive to members of the opposite sex. Certainly the allure of bands like Hanson and 'N Sync among girls of a certain age support that notion.
Music is something that both men and women make.
Musical Bonding OK then, perhaps music is something that pulls us together into groups. But in groups, Homo sapiens has conquered the globe. Maybe people with a biological penchant for music lived more effectively in societies. We will never know exactly how music arose, but maybe all this speculation does have something to tell us. We know that every culture has music and humans have made it since the dawn of the species.