In what way does Golding's Lord of the Flies demonstrate that the evil in humans destroys civilization?I have to chose whether Golding's novel...

To me, the novel shows the first of these two -- I would argue that it shows that the evil in humans destroys civilization.

When the kids are stranded on the island, you can not really say that they are bringing civilization with them.  They are mostly too young to have been affected all that much by civilization.  So they are pretty much starting their own civilization.

But as the book goes on, the kids' own innate selfishness makes them unable to work for the common good.  Because they all act selfishly, they cannot maintain their "civilization."

So I think Golding is trying to say people destroy civilization, not the other way around.