Message picture
A message picture is a motion picture that, in addition to or instead of being for entertainment, intends to communicate a certain message or ideal about society. Message pictures usually present the message they want to deliver in the form of a morality play, and are usually serious (often somber) works. However, not all message pictures are entirely serious, and there are also films spoofing the genre (Sullivan's Travels, for example).
Dore Schary was famous for his message pictures at Metro-Goldwyn-Mayer during the late 1940s and early 1950s. Among these were The Next Voice You Hear, Asphalt Jungle, and Blackboard Jungle. Other famous message pictures by other parties include Guess Who's Coming to Dinner and In the Heat of the Night (the former directed by Stanley Kramer, who was also well-known for numerous message films).
In Indian cinema, B.R. Chopra was known for message pictures. Examples include Kanoon (against capital punishment), Naya Daur (importance of labour), Waqt (importance of time and destiny), Nikaah (against triple talaq (divorce) among Muslims), etc.