The theme has changed a great deal. Initially, post - apocalyptic stories were quite simple in their portrayal of a desolate world. But over time, they've become more complex. Take 'The Walking Dead' for example. It's not just about surviving zombies, but also about the different groups of survivors and their power struggles. It also delves into human nature, like how some people become more savage while others try to hold onto their humanity. And with works like 'Snowpiercer' (both the movie and the graphic novel), it shows how class differences can still exist in a post - apocalyptic world, adding another layer to the theme.
At first, post - apocalyptic fiction was mainly about survival against external threats like mutants or radiation in the 1950s - 60s. But as time went on, it began to explore more internal human issues. For instance, in 'The Road', it was about the relationship between a father and son and the moral decisions they had to make. Also, the evolution of technology has changed how post - apocalyptic worlds are depicted. Now we see more high - tech elements in some works, like in certain cyberpunk - influenced post - apocalyptic stories.