You know all those studies showing that men are better than woman at spatial tasks like rotation of objects and thinking out how objects could fit together? Well, a recent study shows no difference in this respect between boys and girls in poor families. It seems the kids in these families had equally poor access to toys and activities that encourage spatial skills, whereas in middle and upper class families, boys have a far higher access to such toys and activities, and they’re more encouraged to excel in them than girls are.
While we’re at it, did you know that boys on average have their own computer by age 15, whereas young women on average have to wait until they’re in their twenties?
We can start talking about biological differences when the social differences are a little less extreme.