Men feel like they can be a professional and a father. For women it's "or." That's offensive to me. The concept that it's not possible is crazy.

As a country and as a world, we are not comfortable with women in leadership roles. We call little girls bossy.

I'm a feminist because I believe in women... it's a heavy word, feminism, but it's not one I think we should run from. I'm proud to be a feminist.

I wish I could just go tell all the young women I work with, all these fabulous women, 'Believe in yourself and negotiate for yourself. Own your own success.' I wish I could tell that to my daughter. But it's not that simple.

I spent most of my career, including my time at McKinsey, never acknowledging that I was a woman. And, you know, fast forward - I'm 43 now - fitting in is not helping us.

We can each define ambition and progress for ourselves. The goal is to work toward a world where expectations are not set by the stereotypes that hold us back, but by our personal passion, talents and interests.

Facebook is great for women and men. We are enormously flexible. We care a lot about great opportunities for women, we push ourselves to make things as flexible as possible.