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.

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.

Criminal trials are fundamentally about individual accountability whereas truth commissions are less about the guilt of the perpetrator and more about the suffering of the victim. A criminal trial is only incidentally a therapeutic or cathartic process for victims. But truth commissions, as we saw in South Africa, have the advantage of giving tens of thousands of people the opportunity to tell their stories, and not only does that contribute to healing but it also contributes to reconciliation, especially when perpetrators also come and express contrition.

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.

Helping survivors of residential schools in Canada is not the same as the UN sending in peacekeepers to prevent the genocide in Rwanda. But both are a reflection of our culture and of our priorities. Where there is empathy there is always a solution, where there is apathy there is always an excuse.

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.