When you ask single men in their 20s, "Do you want children?" they want children more than women do. Again, economics drive this. If you're a 29-year-old woman, having a baby is going to seriously blow up your career. If you're a 29-year-old man, it isn't.
Actually the family is still the core social unit. Culturally, traditional masculinity was a removed father. That was a false conception of masculinity and the proper relationship between a man and his children.
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.
