"Children of Men
Truth in fiction? With articles about decreased sperm count in men living in industrialized countries, hormone-laden food affecting our kids' development, and now inadvertent cocktails of every drug ever administered forming from human bodily waste that filters into our water supply... One figures that whatever eventually happens in reality will defy and exceed even the extreme speculation in movies like this one.
Really, really good movie. Nihilistic as hell (until the 'morrow at the end), but very accurate depictions of human reactions under stress.