The research points pretty clearly to the rise of companionate marriage, and I just think it's going to keep being popular, for the very simple reason that it's basically the only way to afford a family life in the 21st-century in advanced economies. It's one of the major reasons for the spike in income inequality. Surgeons used to marry their secretaries. Now they marry other surgeons.

You have two things happening: You have the cultural and economic reality of men falling apart and traditional masculinity falling apart.

Look at The Iliad, there's all this stuff about men loving children. The King of Sparta was the most brutal warrior of ancient Greece, and the only thing he liked to do was horse around with kids when he was back from slaughtering. One thing that feminism revealed is that being a distant patriarchal figure was not something men wanted to be. They want to be more involved in the lives of their children, and you can see that once they're allowed to have that connection, they crave it.

Men talk about masculinity through sports and clothes. They don't talk about gender, they talk about LeBron James and whether it's okay to wear lipstick and eyeliner. They're not getting to the question at hand, which is, "What does it mean to be a man when the traditional values of masculinity are eroding incredibly rapidly?'

When you look at how men and women are living together, there are two processes at work. One, women are rising in the middle class; their earning potential is rising compared to men. It has been underway for 100 years, and nothing is going to stop it. On the other hand, women are denied iconic positions of power - equity partnerships law firms, Hollywood salaries.

To me, there's two definitions of feminism. One is that you believe that women are equal human beings; that's not really a philosophy, it's just obvious. And the other is that you're actually fighting for women: you're promoting women and working towards the betterment of women.

Men's gender problems cause them a lot of suffering. There is a massive spiking suicide rate in middle age for men and a cultural attitude to male friendship that is destructive.