The World, the Flesh and the Devil is a 1959 American science fiction doomsday film written and directed by Ranald MacDougall. The film stars Harry Belafonte, who was then at the peak of his film career. The film is set in a postapocalyptic world with very few human survivors. It is based on two sources the novel The Purple Cloud by M. P. Shiel and the story End of the World by Ferdinand Reyher.
Travelling to New York City in search of other survivors, he finds the city vacant. Ralph busies himself restoring power to a building where he takes up residence. Just as the loneliness starts to become intolerable, he encounters a second survivor Sarah Crandall Inger Stevens, a white woman in her twenties. The two become fast friends, but Ralph grows distant when it becomes clear that Sarah is developing stronger feelings for him. Despite living in a postapocalyptic world and despite the fact that Sarah seems unconcerned with their racial difference, Ralph cannot overcome the inhibitions instilled in him in a racist American society.Ralph regularly broadcasts on the radio, hoping to contact other people. Eventually, he receives a signal from Europe, indicating there are at least a few other survivors. Things become vastly more complicated when an ill, white Benson Thacker Mel Ferrer arrives by boat. Ralph and Sarah nurse him back to health, but once he recovers, Ben sets his sights on Sarah and sees Ralph as a rival. Ralph is torn by conflicting emotions. He avoids Sarah as much as possible, to give Ben every opportunity to win her affections, but cannot quite bring himself to leave the city. ........
Source: Wikipedia