What's the meaning of the title "Children of Men"? There are no men giving birth to babies, obviously.
According to Cuarón, the title of P. D. James' book (The Children of Men) is an allegory derived from a passage of scripture in the Bible. (Psalm 90 (89):3 of the KJV: "Thou turnest man to destruction; and sayest, Return, ye children of men.")
James refers to her story as a "Christian fable" while Cuarón describes it as "almost like a look at Christianity": "I didn't want to shy away from the spiritual archetypes," Cuarón told Filmmaker Magazine. "But I wasn't interested in dealing with dogma."
Plot of the movie is:
In 2027, 18 years of human infertility have left society on the verge of extinction. When one woman miraculously gets pregnant, Theo, a bureaucrat, must transport her to safety.
In my opinion, the title is Children of Men, since the book states that male infertility is the reason why no one is able to produce any children in this fictional world. Hence named Children of Men.
Children of Men explores the themes of hope and faith in the face of overwhelming futility and despair. The film's source, P. D. James' novel The Children of Men (1992), describes what happens when society is unable to reproduce, using male infertility to explain this problem. In the novel, it is made clear that hope depends on future generations.