The fact that 98 percent of women in [the U.S.] who are sexually experienced say they use birth control doesn't make sex any less sacred. It just means that they're getting to make choices about their lives.

Today is International Women's Day, and there's a fantastic set of pieces running by an organization called ONE called "Poverty Is Sexist." It's a great way to quickly learn about what's actually going on for women in poverty around the world, and then do something about it.

We have to look at it country by country. In places like the developing world where, as you say, in Mumbai, it's about five hours' gap between what a woman does and a man does. You have to start by recognizing the problem and talking about it, trying to change those roles.

Connect deeply with others. Our humanity is the one thing that we all have in common.

What great changes have not been ambitious?

It is still just unbelievable to us that diarrhea is one of the leading causes of child deaths in the world.

You can have the best vaccines for a woman or her child, but if you can't get her to come and get them then they won't work.