Young Buster with his parents, Joe and Myra, c. 1900
So in general, Buster Keaton was an amazing person who led an amazing life. Maybe he really was a god.
Obviously this is a micro briefing on BK. If you are looking for more detailed info, check Wikipedia for a quick read. There are several biographies of Buster available. The Damfinos' (International Buster Keaton Society) website has a very informative list of books written about our hero; they also have a good biography on the same site. Documentaries have been made about Buster too; check Youtube.
UPDATE 6/19/18: The BK/Damfino Society has revamped their website and apparently removed the book recommendations.