This society cannot go forward, the way we have been going forward, where the gap between the rich and the poor keeps growing. It's not politically viable; it's not morally right; it's just not going to happen.

Design does matter. And not necessarily in a way that people realize. A lot of what you do, people take for granted - that a park has always been here, that a bicycle lane has always been there, that the street is safe or clean.

I'm worried about the world because there's chaos in the Middle East, and I think the Iranian deal [to lift sanctions] is going to continue the Shia-Sunni battles, the Persian-Arab battles.

I'd be happy to provide advice if anybody asked me no matter who the President is.

My father, a bookkeeper who never earned more than $11,000 a year in his life, sat there, writing out a $25 check to the NAACP. When I asked him why, he said discrimination against anyone is discrimination against us all. And I never forgot that. Indeed, his philanthropy was a gift, not just to that organization, but to me.

I know how to make decisions and stand up to the criticism every day.

I think [Winston] Churchill said it was " [democracy] the worst of all systems except for all the others." And that's probably true. It's never gone easily.