What I've found is that there is an enormous shift taking place in our society. Suddenly there are all young women who are better educated and earning more money than men their age. When young couples today decide to marry, they have very different expectations of one another than their parents did. And there's even been change at the very top of the career ladder. People tend to underestimate that.

When women gain access to higher education and then suddenly start doing better at it than the men, that can really throw the prevailing social order out of balance. That's exactly what's happened in South Korea, which is a highly patriarchal society. They started educating women, and then they were no longer the women that society wants them to be. That caused a real cultural crisis.

Men need marriage more than women do. In fact, they need it to survive.

In the US in recent years, around a third of all open management positions have gone to women. My research over the last three years has shown that the trend is going in the same direction at all levels. And by the way, it's not necessarily that the rise of women is causing the end of men - it's more the other way around. An increasing number of men are failing during their education, losing their jobs and then not managing to get back on their feet, so women have had to step in. The driving force here isn't feminist conviction, it's economic necessity.

Feminism was about making women's lives less constrained and giving them more choices.

Evolutionary psychology tells us that men, especially powerful men, feel invincible and entitled to spread their seed, and that women can't resist the scent of masculine power. Women, by contrast, are said to be more altruistic and collaborative, seeking power so that they can share it with others.

We are still proprietary over the domestic realm even as we take over new professional realms, and that is a real problem.