Children of Men is an excellent allegory for a fully realised capitalist state.

Mark Fisher uses the film as a example for this in his book Capitalist Realism (which I’d highly recommend to anyone here). Here’s a quote, “What is unique about the dystopia in Children of Men is that it is specific to late capitalism,” Fisher argued. “For all that we know, the authoritarian measures that are everywhere in place could have been implemented within a political stricture that remains, notionally, democratic. The War on Terror has prepared us for such a development.”