Why is Peyton Manning the best quarterback in the game today?

I lived next door to Peyton when he was at Tennessee and the man is a student of the game. He has studied this game from angles that I didn't even know existed. The books in his living room were titles like Theories of the Quarterback P, Physics of The P, and Mindsets of Famous Quarterbacks. I was a little stunned that the books existed and impressed he delved into all the aspects he could to make himself a better quarterback. Also, it sure doesn't hurt you have Archie as a dad and you have had a football in your hand since before you could walk.