briffault law?
while humans are animals in biology, but we have far more ability to act against instinct and to create complex systems of socialization than any other animals right?
and if you study briffault's work, there is 0 reason to believe his law has any relevance to contemporary gender roles or behavior
because you'd then be aware that the law was specifically describing the behavior of non human animals and to a lesser extent early human tribes. he also goes on to argue that those systems were replaced by male dominated systems around the time we began cultivating crops for food and such
and you have to also ignore the majority of the last 4, 5 centuries or so
and what about rape?
you still want to argue women determine the conditions on which men and women associate sexually or romantically, then you'd have to show that no statistically significant number of women had ever been broken up with
women initiate divorce 2/3 of the time, but now we're not talking about some kind of hard social power imbalance... at most, it's a tendency. not to mention recently divorced women are more likely to live in poverty
and while i agree a woman would prefer association where she gains something (protection, your company, emotion, financial security, sex) ...you can say the same of men (sex, emotion, company, children, a maid, etc). most human relationships men or women, look for something to gain, exploit, learn, trade in a relationship
research also strongly suggest women afflicted with a serious illness were at least 3 times as likely to become separated or divorced as men with similar health problems
http://onlinelibrary.wiley.com/doi/10.1002/cncr.24577/abstract
https://well.blogs.nytimes.com/2009/11/12/men-more-likely-to-leave-spouse-with-cancer/