We need to talk more openly about mentorships and sponsorships. Women don't get the mentoring, and particularly the sponsors, they need to succeed as much as men.

At Facebook we feel a lot of affinity not just for this community but for any community that is trying to do what Davos is trying to do, which is to share information. And Davos is doing it in a particular way - I think the Facebook approach is obviously more broad-based, we're trying to include everyone in the world. But the goal is the same: bring people together, to share information and make the world more connected, and have people have a deeper understanding of themselves, others, the communities of which they want to be a part and can be a part.

Without fear, women can pursue professional success and personal fulfillment-and freely choose one, or the other, or both.

A truly equal world would be one where women ran half our countries and companies and men ran half our homes.

We're focused on doing one thing incredibly well. If you look at other companies, all of these companies are doing a lot of different things but we're still, as we grow, doing exactly one thing.

Women are not making it to the top. A hundred and ninety heads of state; nine are women. Of all the people in parliament in the world, thirteen per cent are women. In the corporate sector, women at the top - C-level jobs, board seats - tops out at fifteen, sixteen per cent.

In our performance reviews with women, we need to be saying, "Are you reaching enough? Are you applying for jobs when you meet some of the criteria like men, or are you waiting to meet all the criteria like women do?" There's so much we can do to encourage women to take on more and believe in themselves.