There is a culture of corruption in many parts of the Mexican media, of course. It seems that there are fewer and fewer media outlets that permit authentic free expressions. But Mexico also has extraordinary journalists who, despite the dangers they face, have also been leading the way in this battle, who've really played a role in keeping the cause of justice alive in the Ayotzinapa case. And no matter what, they'll keep doing that.

I've written one book-length piece of journalism. The Art of Political Murder: Who Killed Bishop Gerardi? That book had an impact. Eight years after it was published it's still having an impact in Guatemala. I remember when I wrote it, a surprising number of people said things to me like, "That is such an amazing story; why didn't you turn it into a novel?"

There's a certain advantage to living in a small country like Guatemala, I think. You don't feel so distant from political reality there. When things happen, they almost seem to happen on a Shakespearian stage with the audience so close they can become actors too. This is partly what Joseph Brodsky meant when he wrote that small countries have big politics.

I'm not a Mexican writer, but I think everything that happens in Mexico affects the Mexican writers I know, in their sense of being human and of being Mexican, even if they don't in any explicit way address these issues in their writing.

I think everything you are, everything that engages you, eventually comes to bear on the novel you write. I think the creative energy in novel writing, obviously, comes from tension. From trying to fuse. From trying to make coherent disparate things that might not at all seem to belong together within a narrative.

Narco fiction novels have a reputation, at least here in Mexico among some of the writers I know, of being somewhat rushed productions, usually written in one way or another like crime thrillers, with something cheesily exploitative about them. It feels exploitive - taking this horrible and ongoing tragedy and trying to turn it into something entertaining. Or trying to turn it into something that might earn the writer a reputation of the sort that many writers believe they aspire to. Or earn them money.

Maybe Pope Francis will say something on his visit to the US, maybe he'll rebuke Donald Trump and anti-immigrant racism and demagoguery beautifully, in a way that illuminates hearts and makes people begin to turn away. That would be miracle enough for me.