I'm not hopeful about America, and I'm not hopeful about the world, no. Life goes on and, for those of us who are lucky, there's a great deal to enjoy in it. But will things get better for most people? I don't know. I don't see the evidence.

The big idea behind it was to somehow participate in the discussion about justice. What does it mean to be just to the others out there whose lives we do not think about. One of the answers I came up with was simply tell their stories.

It wasn't a deception: all lovers live on partial knowledge.

It's an Obama book, certainly. I was delighted, and astonished, to hear recently that he was reading it. It's a book about a new kind of American reality, one that takes diversity for granted. It doesn't celebrate diversity, actually, it just says: this is how we live now.

If you see a theme that you might want to take a photo of, you sort of stand there for an hour waiting for it to resolve, waiting for the geometry of a theme to be exactly what you want them to be. That was my process to get photos.

Yes, there's a relaying of internal states that only a novel can achieve. In my view, the novel is one of Europe's greatest gifts to the world. America and Africa collaborated to give the world jazz. We'll call it even.

You know that this vignette and that vignette belong side by side, you know that a certain turn of phrase you've been saving will probably work best within a given section of the narrative. As in a jazz performance, writing lives or dies by what's produced in that moment. But that moment is attended by long preparation.