Annie Jacobsen

And it's so magnificently filmed.

And it's so interesting.

And that moment where they go back in time and you realize someone had been videotaping the previous generation of chimps.

and that their anger and their fighting was based on revenge.

That blew my mind.

Because I often think, because I write about war and weapons, I always think about nature versus nurture and were we built this way?

This is a very interesting thing to think about, like your electric caterpillar.

They were fighting over resources.

But it was also revenge.

Remember that?

There was like a score to settle with the previous generation.

And that, to me, was stunning.

And also that one of the guys, I love that they named everyone, but one of the chimp's brother, I think it was, like head chimp's brother, lost his arm in a poacher's trap.

Remember that?

And when you think about chimps and how important their arms are swinging from trees, like under – if you just followed the logic about survival of the fittest, then that chimp, the brother chimp would have died because he didn't have one of his hands.

But instead –

The other brother, the lead chimp, made sure he was taken care of, which is like so human war.

I still think about that.

Okay, so you think chimps were pointing and then from that you had to figure over long amounts of time.

You mean apes have evolved into the Stone Age?