Buster Keaton's life was both a comedy and a tragedy.
Years ago, when I was first introduced to the comedies of Buster, I witnessed someone whose universal appeal was immediately evident in his unique style and stage presence. He was an everyman (almost always playing the underdog), yet he was like no one I'd ever seen before. He moved like a cartoon character, performed stunts that to this day seem beyond human capacity, and he did it all with a…