There are realities that one needs to deal with, but very often what we are told is political reality is merely cynicism. One could equally say that slavery is a reality, and misogyny too.

Storytelling is very important. It is through context and relations that we understand the importance of human dignity. The concept means nothing as an abstraction. It's important for us to understand why people do the things they do, including the monsters - the suicide bomber and the war criminal. Understanding is not acceptance. Understanding is exploring the human psyche. If we want to put an end to violence, we need to have the sort of conversation I had with the teenage suicide bomber.

In many instances violence - which obviously inflicts tremendous trauma on victims - also inflicts trauma on the perpetrator. Radical evil takes a lot of preparation, not just from an organizational point of view, but from brainwashing, psychological preparation and the legitimization of violence.

When we deconstruct how radical evil occurs we realize that it is anything but spontaneous combustion. You need pyromaniacs.

I hate the tribal hatred thesis - in Yugoslavia and Rwanda and places like that they kill each other because that's just what people do there. I think it's profoundly ignorant. I was astonished when Samuel Huntington wrote his famous clash of civilizations essay in response to the Yugoslavian war. I was on the streets in Sarajevo and every other person I met came from a mixed marriage. And here is Professor Huntington from Harvard writing this is a clash of civilizations. That was absurd.

We need to sacrifice something. And this is what I find lacking. We want to construct an image of ourselves as virtuous but we don't want to suffer for our beliefs. We want to change the world with a Facebook like. That's not how the world works.

When I joined the UN War Crimes Tribunal, it was a realization of the dream of justice, that finally after Nuremberg, the UN is going to put the accused on trial again! And I still believe that accountability that eradicates impunity is very, very important for transforming the sordid culture of politics and power that we see in the world. But we need to be humble about the fact that justice will not bring back the dead.