This is an ideological position, not a scientific one. For many years it was the default position, the null hypothesis, that masculinity and femininity were mer

This is an ideological position, not a scientific one. For many years it was the default position, the null hypothesis, that masculinity and femininity were mere social constructs, and that the human brain, being completely plastic, was shaped by 'patriarchal' social conditioning into male and female forms, making the female subordinate. It was Marxist class theory crudely forced on to biology, Contrary evidence has piled up over the years against this null hypothesis, until now it is quite untenable.