Look, I may not be totally correct but I've spent ten years studying this topic in depth. I think our civilization is also vulnerable to the same factors that caused their collapse.
I'm more than a little worried about you if it takes 10 years to digest a single Wikipedia entry.
And how did you have time to cover the great Bison migrations if you spent a decade arguing with the poor bastards on your Roman fanclub forums?
What's your name on there by the way?