Reverend wrote:

What it's really about, to me at least, is how people - from individuals, mobs, groups, nations all the way up to the species in general - deals with and adapts to (or not, in some cases) extreme stress and upheaval
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You could say that about any disaster movie (I see zombies as more disaster than monster movie, same thing, a vast seemingly unstoppable force comes across our heroes). Its just that the bit where an explanation is squeezed in seems a little bit, dare I say it,
too geeky.