Go here to read an interesting discussion on Children of Men and I Am Legend.
Children takes place in London in 2027, eighteen years after a pandemic of infertility renders humankind unable to produce offspring. In the face of impending extinction, Theo Faron (Clive Owen), a white, middle-aged bureaucrat, helps Kee (Claire-Hope Ashitey), a black, inexplicably pregnant refugee, rendezvous with the Tomorrow, a ship belonging to the Human Project. Although Theo cannot be sure that the Human Project exists, he gives up his life to escort Kee and her newborn to be rescued by this group of the world’s “brightest minds” and “wise men doctors” working on a cure in the Azores.
Set in New York in 2012, I Am Legend takes place three years after 90% of the world’s population dies due to the lethal mutation of a genetically-engineered virus. The virus, which initially cured cancer, transforms another 9% of the population into “dark seekers,” vampiric zombies who then “killed and fed on” the 1% with immunity (about twelve million people). Only one middle-aged man has supposedly survived the double-catastrophe of plague and monster invasion, Robert Neville (Will Smith), an African American Lieutenant Colonel of the U.S. army and virologist, who spends his days at “Ground Zero” searching for a cure. When Neville produces a vaccine, he sacrifices himself so that two other recently discovered survivors, Anna (Alice Braga) and a young boy named Ethan (Charlie Tahan), can escape with it to a survivor’s colony in Bethel, Vermont.