Moloch in Metropolis

A rich son of a powerful mechanically advanced city goes down below to the industrial machine and has a horrific vision of the people being sacrificed to Moloch as they march straight into the demon’s mouth as priests resembling Aztec priests guard the entrance. The people move in lockstep and are devoured by the system. This begins this son's spiritual awakening to the suffering of the people under a tyrannical and decrepit way of life that he had not understood previously. But the symbolism in the movie does not stop there.