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.

I know from my own experience that the path to change is best traveled when we travel together.

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.

But the upside of painful knowledge is so much greater than the downside of blissful ignorance.

It's hard to visualize someone as a leader, if she is always waiting to be told what to do.

There's a lot that needs to be fixed in dating for men and women in the U.S. - there's a lot of pressure on women to do things they may not want to do. And if you start out unequal, you are not going to end up with equality.

Over the last 10 years, women have stalled out at the top.