He had been looking at a bunch of physical differences between the sexes, but he was curious about how men and women would act with social changes. He flipped through the book coming to Social dynamics. There was reams and reams of different dynamics for different societies across the world. This seemed a bit overwhelming at first but then he spotted general dynamics that applied to almost everywhere.
He sighed a breath of relief and looked it over. It went on to describe how in pre-historic times, "males were typically hunters and providers while the females were caretakers and nurturers. This dynamic typically came about because of the physical differences between men and women. Males were usually the physically stronger and taller ones and so hunting fell to them and Females took care of society while the males were away. This early societal dynamic still somewhat lingers today where most modern societies are typically considered patriarchies, though there's much more gender equality in the modern era than there was before."
He looked it over and mulled over what he should change. Should he change something in general or go for something more specific?