The Grapes of Wrath is the most mature picture story that has ever been made, in feeling, in purpose, and in the use of the medium. You can drag out classics (it is often safer not to go back and see them) and you can roll off names in different tongues and times. But this is a best that has no very near comparison to date. I still don't know how they did it, though its possibility has been latent in Hollywood for years. The story of the Joad family, with its implied story of a migration of thousands...