Children of Men and the Hunger Games trilogy cover the same ground thematically, but their presentation of the themes differ. Both stories use children and a dystopian setting as the centerpiece. Both stories also only feature one functioning government that is a police state. In both stories, control of the children shows control of the future. The Capitol's Hunger Games shows the Districts that they control every little part of their lives. In Children of Men, the lack of children shows the uncertainty of the future ,and thus the government is trying to control everything else and expel the immigrants. In the Hunger Games, control of the children is basically the embodiment of political power. Children of Men shows the same effect. The Fishes want to reveal that Kee is pregnant so they can use the baby as a source of power for their revolution. Theo also notes that they cannot go to the government for the same reason, they will use the baby for their own ends.
Another similarity between the two is that the governments method of control proves to be their downfall. In the Hunger Games, Katniss's hero status and popularity is a direct result of winning the Hunger Games and foiling the game makers plans. In Children of Men, the government is trying to get rid of illegal immigrants, and yet the only known pregnant women in the world is an illegal. In an effort to gain control and fix their problem, the government is in fact making it worse.