Robert George O'Meally[1] is an American scholar of African American culture and jazz. He is the Zora Neale Hurston Professor of English and Comparative Literature at Columbia University.[2] (wikipedia)
It's a music that has to do not only with improvising by yourself, but being able to cooperate with other people.
Jazz is a highly disciplined music that is very impatient with people who don't play, well, any sort of lazy imitation that can go with it.