Truman Capote invented the non-fiction novel.
Michael Moor invented the all-fiction documentary.
Both variaties were never heard of from again.
Truman Capote IMO was a genius. He invented to some degree, the modern true crime genre. In addition, he was a great writer. An odd man personally, obviously, but a great talent nevertheless IMO. Michael Moore on the other hand, is a con artist, a propagandist, a clown, a liar.