I think a lot of differences in the sexes can be explained by pregnancy, birth, and breast feeding. Females get pregnant, give birth, and breast feed after bir

I think a lot of differences in the sexes can be explained by pregnancy, birth, and breast feeding. Females get pregnant, give birth, and breast feed after birth. Prior to modern medicine there was no reliable birth control. Maternal mortality was high, and there was no good substitute for breast milk. Because of that, a female could expect to spend up to 2 years at a time, where she was primarily responsible for supplying 100% of the nutritional needs of another human being, and at a fairly large disadvantage in finding food or avoiding being eaten. Compared to other primates, human babies are pretty helpless for a long time. It would be pretty surprising if tens of thousands of years of this did not produce certain personality differences and brain differences, especially as success at producing new members of the species drives evolution. Only in the last 50 years have we had fairly reliable ways for a woman to be able to effectively control when she gets pregnant, safely give birth, and have a way to either safely store breast milk or else have acceptable nutritional substitutes (formula).