I'd worked on leprosy and malaria in India [at the World Bank] and asked myself the question: Why do we let 2 million children die every year around the world for not having clean water? Because they're faceless and nameless. So, for me, Facebook looked like it was going to solve the problem of the invisible victim.

We know when we use the full talents of our population we're more productive. And we know that when people really feel like they can have flexible lives, they're better employees.

If you do please everyone, you are not making enough progress.

I don't hold myself out as a role model. I don't believe that everyone should make the same choices; that everyone has to want to be a CEO, or everyone should want to be a work-at-home mother. I want everyone to be able to choose. But I want us to be able to choose unencumbered by gender choosing for us.

Leadership is about making others better as a result of your presence and making sure that impact lasts in your absence." (Harvard Business School definition of leadership)

In those same 10 years, women are getting more and more of the graduate degrees, more and more of the undergraduate degrees, and it's translating into more women in entry-level jobs, even more women in lower-level management. But there's absolutely been no progress at the top. You can't explain away 10 years. Ten years of no progress is no progress.

Someone who values fairness and expects or, even better, wants to do his share in the home. These men exist and, trust me, over time, nothing is sexier.