The way I portrayed the people is accurate. Because they're human beings and we have a kind of wonderful capacity to be absurd and ridiculous.

I wasn't in any way a kind of soothsayer or not surprised when Sept. 11 happened. I was absolutely shocked.

It's not a good idea to define the boundaries of normality by tearing apart people who are outside of it.

Suddenly, madness was everywhere, and I was determined to learn about the impact it had on the way society evolves. I've always believed society to be a fundamentally rational thing, but what if it isn't? What if it is built on insanity?

I think if somebody is so set in their ways about what they feel about something - and you get this a lot in academia, of course, and also different sorts of journalism too - you're going to sweep under the carpet the facts that don't suit your thesis. And I think that happens quite a lot in the courtroom, for instance.

On social media there's this thing where on many occasions, there's a single proscribed way of acting. Like if somebody dies, everyone has to say "R.I.P.! R.I.P.!" Basically they're saying, "Don't hurt me, I'm a good person."

We have to understand how the extremists got the way they are. Without that kind of understanding, we'd never really get to know them. I put in nothing about their childhoods. But what I have put in is stuff about the weird symbiotic relationship between us and them.