The responsibility for the risks we posed to others in some of our most extreme actions in those underground years never leaves my thoughts for long. The antiwar movement in all its commitment, all its sacrifice and determination, could not stop the violence unleashed against Vietnam. And therein lies cause for real regret.

[Lyndon ] Johnson was responding to a black freedom movement that was tearing the country open and he did what he had to do as a conservative politician.

His [Martin Luther King] last book, Where Do We Go From Here: Chaos or Community, is a direct reference to angles, barbarism or socialism.

Part of the fun of writing, touring, teaching, is engaging with real people about all of it: what to do now, how to build a movement, of approaches to teaching, of parenting - it's exciting to be in that dialogue.

Now in my view, if you were to line up the Presidents in the order of who made the greatest accomplishments, you'd put Lyndon Johnson in that arena with both Roosevelts probably, and [Abraham] Lincoln and so on. But the idea that Lyndon Johnson was operating as a free agent and coming up with these ideas on his own is nonsense.

I knew Barack Obama, absolutely. And I knew him probably as well as thousands of other Chicagoans.

Let's look at two things real quickly: the civil rights movement in Mississippi in the Sixties and the Arab Spring starting in Tunisia and Cairo. What they had in common was people who were told, and who believed inside themselves, that they were a certain way, and the society at large believed it.