How did Elvis change the World with Rock and Roll?

I guess he did not set out to change the world. The world was ready to change and he only gave it a very potent way of expressing the change. There were undercurrents that were making waves. The whole black movement of black music was slowly being heard from the back alleys and the hon*ky tonks. He was a perfect harbinger of the change that the world had been waiting for a long time.

The King, not only rock, he did italian music, like is now or never, brazilian, spanian. He still de number one.
By example, My Way is better than Sinatra version.

I think you are right. Even today so many years after his death you still hear his influence in the music world and a lot of time the younger generation doesn't realize it.

Yes, he sure did. Changed it for the better. Elvis was just being himself and inadvertantly changed music forever, and it changed the way we danced, the way we thought, and the way we dressed. I think some people don't realize that if it wasn't for him and the others in the rock and roll hall of fame, they wouldn't have the music they like of today because of the progression it took. Elvis is the king.