The whole tradition of cinema is dominated, really, by films about good guys versus bad guys, good versus evil. But we have very few films about the nature of evil itself.

We lie to ourselves and try to escape that bitter reality by saying that the world is divided into good guys and bad guys, and that we're the good guys. We condemn people as evil to reassure us that we're not like them. If there's to be any hope of preventing these things from happening again, we have to look at the reality. That any act of evil in our history was committed by human beings like us. That, very often, we're all implicated in it.

When you approach someone as a human being, truly and try to be as open as safety allows, some of the bigger reenactments with a whole army of paramilitary people participating, I couldn't say my feelings openly in front of everybody, without it being dangerous for my crew.

I always have said, you know it's not for me to forgive or to condemn, I'm a filmmaker.

I've become more forgiving, even though I have no patience at all for denial, justification of wrong, rationalization. I've become virtually a pacifist, so I feel that no atrocity is ever justified. I've become more vigilant about evil. I think I recognize its seeds more quickly. I see its source.

I believe every time you film anybody, you create reality with that person - whether it's fiction or nonfiction. If you acknowledge that filming is an occasion where people express things they might not otherwise express, that offers a much more insightful analysis of why documentaries - even of the fly-on-the-wall variety - are powerful. I think that our task as filmmakers is to create the most insightful reality given the most pressing questions.

In a fiction film, we know at some level we've suspended disbelief. In a documentary, we know that we're watching a drama unfold in the world because of the movie we're watching that is real. That has enormous stakes for the whole society, and we, by the act of watching, complete the story.