Here in America we have a man [Donald Trump] who is a master of a medium that is all about self-aggrandizement and/or cruelty to others. I have been off Twitter lately because I had this sudden sort of feeling of, this man is the president of this club and it's not a club that I want to be in. Sometimes I feel like, well, perhaps it's not right because as a political activist, this is where politics is happening right now. This is where the conversation is going on, but at the same time, I think there is something corrosive about it.

It is part of what makes America great. That tradition of the free press, and also the tradition of this highly competitive market for investigative journalism. We're seeing, there's no question, that we're seeing a renaissance of that.

That one lesson that African American communities have learned over the centuries in America is that you can't just take for granted that things will steadily get better and better and better until they're great. It is fits and starts. It is backward and forward.

I think it's hard sometimes for people to grapple with the real-life consequences of political change. I think that, we as a culture, feel like politics is one sector of our lives that can feel apart from our personal lives and the cultural things we're interested in and the sports we watch. It feels like this separate, different thing.

In terms of optimism, I am optimistic. I do think that, in the long term, that America will right itself. I have to think so.

There is no shortage of ways that people profit indirectly from the misery and cruelty in other places. Even now, the shirts we wear and the tomatoes we eat. There are unfortunately unfair and inhumane conditions - including literal slavery - all over the world.

A book is not a tweet. A book is not a half-hour television show. A book requires for both reader and writer sustained discipline attention. It asks you to immerse yourself in something and really deeply feel it.