It's amazing how successful films about loners can be: Taxi Driver, The Wrestler, The Conversation. This film gets inside a lonely man and dissects his problems with life. He's trying to make a living and keep out of trouble, but that's not enough, it doesn't work. As Coppola admits, he only got to make this film because he was so successful with The Godfather. It's art house, but very clever and intricate, posing questions about sanity, responsibility, religion, love and loneliness. Gene Hackman is beguiling. I was impressed by how far Coppola took the idea.