Careers are a jungle gym, not a ladder.

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.

Women have made tons of progress. But we still have a small percentage of the top jobs in any industry, in any nation in the world. I think that's partly because from a very young age, we encourage our boys to lead and we call our girls bossy.

Trying to do it all and expecting that it all can be done exactly right is a recipe for disappointment. Perfection is the enemy.

I have never worked for a woman, and I have never worked with a lot of women.

Two things that I think matter are gratitude and joy.

If more women are in leadership roles, we'll stop assuming they shouldn't be.