What Made Charley Parker and John Coltrain Great?

Charley parker and john coltrain are two that stand out to me. Charle parker really was the one who who blazed the trail of beebop. John coltrain is still highly mimicked, and his music has influenced so much of what goes on in modern jaz to day. And i want to ask the question: how did they become great? What instilled in them this incredible ability to create mus that has changed the way we think about jaz,. The next episode will look at some ideas from malcolm gladwell's book 'out lier'