What was the Oldest Civilisation on Earth?

And crocodilians predated the dinosaurs, but I forget if the modern-day crocodiles are actually descended from them.

Don't dismiss you own intelligence, even if other people been rotten enough to do so in the past! "Intelligence" is not a single number but an extremely complex hodgepodge of abilities, disabilities, talents, and whatever the opposite of talent is called. Some people are good at everything, some people are good at nothing, and the vast majority of humans are like you and me, good at some things and not at others. So, since you're good at something I'm not, and you don't say boneheadedly stupid things the way 4/5 of Moviechatterers do, I think you have to be "reasonably intelligent", as I said of myself.

Human intelligence really is a strange thing. I once met a world-class mathematician, and he said that even though his mathematical abilities were outstanding, his other skills including language skills were far below par. He said he read slowly and wrote so poorly he had a secretary to write for him, plus his social skills lived up to the stereotype. Would you call him "intelligent"?