Every politician - FDR, Lyndon Johnson, Abraham Lincoln, Barack Obama - they're all conservative by nature. They are part of the big thing and they're moving in a very constrained world.

So we were ecstatic and we swirled around spontaneously, the campus in Ann Harbor and about 4,000 of us landed on the steps of the president of the University of Michigan's home.

In some ways a mark of good parenting is that you don't try to make your children into little knockoffs of yourself. None of us went into business. None of us became powerful people like that. All of us pursued our own passions and our own interests. One of my brothers was filmmaker. One of my brothers was a teacher. My sister was a librarian.

When I was arrested opposing the war in Vietnam in 1965, as I said about 20 or 30% of people were opposed to the war. By 1968, more than half of Americans were opposed to the war. If you pull in Europeans, Canadians, people from around the Third World, the war was vastly unpopular. But even half of Americans by 1968 opposed the war.

I thought in 1965 that my job was to convince most Americans to be against the war. So I spent summers knocking on doors, handing out literature, trying to talk to people who didn't agree with me, trying to get them to see the war was wrong. And by 1968 a majority of Americans did oppose the war.

I always say your body is the temple of your spirit, why not decorate it? My kids say, no, no, your body is the temple of your spirit, keep it clean. I'm covered in tattoos and I get a tattoo every time I write a book. I get the tattoo from the book.

You will be raising these kids in your mind your whole life. And they will change you. Your little contribution to it - twenty years from now, they'll be marching off into other things and that's still the legacy you leave.