I'm surprised we've got this many comments without anyone mentioning Soylent Green. SPOILER Soylent Green is both the name of a 1973 science fiction film and

I'm surprised we've got this many comments without anyone mentioning Soylent Green. SPOILER Soylent Green is both the name of a 1973 science fiction film and of a wafer-like food product in the film. The film is a police procedural set in the future, based on the 1966 novel Make Room! Make Room! The food is a processed protein ration made of human beings and distributed to an unsuspecting populace.