Utopia is a prequel to Children of Men.
Despite several differences in their respective timelines, Utopia offers one of the most probable results of the Network's plan to cull down humanity to save the planet from the inevitable resource crisis.
http://tvtropes.org/pmwiki/pmwiki.php/WMG/Utopia
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Despite several differences in their respective timelines, Utopia offers one of the most probable results of the Network's plan to cull down humanity to save the planet from the inevitable resource crisis.