I think it is one of the most extraordinary elections, a turning point for our country and for the world. That remarkable young man [Barack Obama] has kept his demeanor, kept his temperament and has shown a power to inspire. I see what energy that he has inspired among the young. Well, it inspires us old goats too.

There's an awful temptation to just keep on researching. There comes a point where you just have to stop, and start writing.

I could not do what I do without the kindness, consideration, resourcefulness and work of librarians, particularly in public libraries... What started me writing history happened because of some curiosity that I had about some photographs I'd seen in the Library of Congress.

To shut yourself from history is to shut yourself off from say music or painting or the theatre, literature for the rest of your life. It would be to cheat yourself of the pleasures of life.

History is not just about dates and quotations. And it's not just about politics, the military and social issues, though much of it of course is about that. It's about everything. It's about life history. It's human. And we have to see it that way. We have to teach it that way. We have to read it that way. It's about art, music, literature, money, science, love - the human experience.

I think it's best to pick a biographical subject who lives to a ripe old age. Older people tend to relax and speak their minds. They're dropping some of the masks that they've been wearing. There's a candor.

If you get down about the state of American culture, just remember there are still more public libraries in this country than there are McDonalds.