re:
while women stayed home in the cave nattering away to their cave children

in hunter gather societies, the gather's (the women) gather 90% of the calories consumed.

the men hunt (and trap or kill) 10% calories.

those 10% calories are very often vital proteins, (with fat and B vitamins) but day in, day out, the women work and don't have much time for sitting round the campfire doing nothing. (what a sexist point of view.. i suppose women who are stay at home mothers don't 'work' either.. (yeah, babies change their own diapers, yeah, sure.)

men starve with out women's gatherings. woman become mal nurished,and often unable to hold/complete a pregnancy with the proteins men provide.. but if this has something to do with language, i am missing it.