From a review of Cinderella Man:
"The film is based on the true story of James J. Braddock, whose inspiring rags-to-riches comeback in the dark days of the Depression prompted newspaper writer Damon Runyon to slap him with the epithet “the Cinderella man” — a rather milksop moniker for a boxer, and even for a boxing movie. I guess the fairy-tale reference made more sense to Runyon’s readers and Braddock’s fans than, say, “the Nicholas Nickleby of boxing,” though that would have been more accurate on several levels. Of course, it would have made an even worse movie title.
"Still, as portrayed in Cinderella Man, for sheer decency and dogged heroism Braddock is every bit the match of Dickens’ archetypal hero. G. K. Chesterton’s characterization of Nickleby as “poor, brave, unimpeachable, and ultimately triumphant” applies equally well to Braddock, whose Depression slump is as grueling and unremitting as anything in Dickens."