The zombie genre has undergone a dramatic transformation over the past two decades, and Alex Garland's work from 28 Days Later to the upcoming 28 Years Later illustrates just how far it's come. What started as a straightforward horror story has become a layered exploration of society,

Halfway through “28 Years Later,” our young hero, Spike (Alfie Williams) learns a new phrase: “Memento mori,” Latin for “remember death.” In a world bound by death — borders and culture defined by it — one would be hard-pressed to forget.