Most people think Rap started in the late 70’s and blossomed in the late 80’s. Wikipedia cites a 1971 Isaac Hayes album as the more or less official beginning, while pointing out its African roots and the ubiquitous influence of blues.
Fair enough, but I think Rap began with Dylan’s Subterranean Homesick Blues. And why not? If rapping has its origins in the blues, are we surprised if Dylan picked up on some stylings from, say, The Memphis Jug Band, and then poured it out into modern pop music?
We shouldn’t be. You don’t need a weatherman to know which way the wind blows.