Muhammed Ali or Paul McCartney

Man oh man oh man. My friend Jon just asked me this today and it blew my mind. What a question! I had to resurrect the blog in order to do the question justice. I just can't figure out who is bigger. Would Ali get the nod in Africa and Paul in Europe? What about Asia? I guess maybe, if I *had* to choose, I would choose Ali. Certainly he was a better writer of prose. Right?