According to recent research, the female brain is the human default structure. The male brain, they say, is just a female brain on testosterone.

The effect starts when the male fetus is only six weeks old and develops testicles. The female brain is not significantly hormone affected until puberty. That explains why little girls are so sensible and also explains high school girls.

All this was discovered after research psychologists overcame their fear of feminists a few years ago and decided to really study male-female mental differences. The work included functional brain scans and tests of all ages.

Feminists should be pleased. The very few widespread social differences are about as expected. Men tend toward more automatic cooperation under stress (soldiers, football); women tend to be better at nurturing (that’s how we’ve survived) and indirect aggression (women are smaller and need some response to direct male aggression.)

Except for very small portions of the population, the individual differences are even smaller. Men tend to be more able to mentally rotate a solid object. And while vocabularies are about the same for similar education, women tend to have fluency in more of it.