It may have happened two and a half thousand million years ago, but I don't think it's going to go away tomorrow. One of the things I noticed about your book is that you write much more about women than men. No, not really. I have a brother. I come from a boring lower middleclass household in Liverpool's Left Bank, a nuclear family of the most tedious kind.
Women are biologically much more interesting because they do the genetics.
They pass on the genes. Women have all kinds of set patterns and systems of inheritance that men don't have. A complete set of human genes passed down only through females, the so called 'mitochondrial' genes. That in itself adds a range of interest. The old biologists are obsessed by sex, it's the most interesting question in biology.