The main storyline is concerned with workers, capitalists and academic thinkers (resp. 'down' and 'stars' ?). And it might become much more relevant again soon. What's the use of a college education in times of recession and strikes? Like Jack Palance said in le Mepris (1963, Godard) 'wise men don't humiliate others with their lesser abilities....'. 'On The Waterfront' was way better on this economic subject, but as far as I'm concerned that was merely because of its director and protagonist. Others might emphasize it is American and has more suspense, which is true.
The dialogues sound kind of flat or monotonous, but the story is absolutely entertaining enough and the cinematography by Mutz Greenbaum (Thunder Rock) is really fine. He especially knows his way with contrast and composition apparently. Carol Reed (Odd Man Out, Fallen Idol, Third Man) gently develops the story and the points he (and writer Alec Coppel, who also wrote Vertigo and Obsession) wants to make. The movie as a whole is a quite moralistic and a bit too sincere, but again the directing and the cinematography more than make up. At last but not least, Michael Redgrave (Thunder Rock, Mr. Arkadin, the Innocents) puts forward a great deal of realism, enforcing A. J. Cronin's points. A point is that different social classes should have more respect for each other because they are complements, not substitutes. Another point is that it is probably a personal story (Cronin's ?). 8/10