So the only question that remains is which is the social construct:
(a) MRIs
(b) subcortical gray and white matter
(c) the notion of "volume"
(d) 1 month old infants
Or maybe (e) All of the above.
(a) MRIs
(b) subcortical gray and white matter
(c) the notion of "volume"
(d) 1 month old infants
Or maybe (e) All of the above.
(x) assigning infants to the female vs male groups
(y) distinguishing brain matter by color
More seriously, I've always subscribed to the idea that nurture had a somewhat greater hand than nature in gender differences, e.g. when an adult keeps talking over my 3y-old daughter saying "you're so cute" and not listening to what she is trying to say; or complimenting her on her hair or clothing, never on the quality of her speech or actions.
http://slatestarcodex.com/2016/03/16/non-shared-environment-...
I strongly believe that the fundamentals of our personality and human nature are hardcoded and we only really fill in the details when we grow up or put them into context of something else...
Then answer (e)
This solves all these questions, for now and forever. Theory, proof, fact and figures pale in the shining light of emotion and feeling in this new age of irrationality.
'Cause that's how you get burned at the stake.