Clifford had a fantastic and innovating solo career, as well as one hell of a contributor with such heavyweights as Sun Ra, Sam Rivers, Sunny Murray, and Archie Shepp. His work is commonly boxed in to the expansive genre of Free Jazz. Politically, he was very convicted and he had no qualms letting others know of his leanings. These views, as justified as they might have been, led to a ban from entering France where his work was fruitful. He is suppose to have met with the Black Panther Party's Bobby Seale and Eldridge Cleaver, and he accepted a position with UNESCO's International Bureau of Education to be an educational counselor on African-American education. So, he was very active in bettering the inhumane conditions which saturated the 1960's and 70's. Like I said, a man of conviction. There's much more to learn about Mr. Thornton, so I suggest you read up on him.