Thinking about the world writ large, I am more optimistic than not that we will tackle our most pressing challenges, whether poverty or equality for women and girls or climate change; but I also know we'll only tackle them if people are really informed about the challenge and what's proven to work.

When we look at that jingoism and the sexism and the racism and the homophobia, that's not who we are, and that's not the country that I want my daughter to grow up in.

I certainly believe that all of my friends should have the right, as Marc and I did, to marry their best friend. I certainly expect my straight friends to help us achieve that for all New Yorkers, for all Americans, and for the children that, at least, Marc and I hope to have someday.

Caricatured as navel-gazers, Millennials are said to live for their 'likes' and status updates. But the young people I know often leverage social media in selfless ways.

I can't imagine anything that would make the world look more different than if women and girls were unequivocally enfranchised.

My parents taught me to approach the world critically, but also to approach it with a sense of responsibility.

For most of my life, I deliberately led a private life in the public eye.