John Ford’s Oscar-winning 1940 vision of the ant line of Okies marching across the Depression desert to California was based on John Steinbeck’s best seller, and it remains, for better or worse, Ford’s best-known and most “respectable” film. Ford’s admirers have rightly tended to play this down in favor of his later and more personal westerns, but there’s much to admire here in Gregg Toland’s sun-beaten photography and Henry Fonda’s meticulous performance as Steinbeck’s dashboard saint, Tom Joad.