how did the neolithic age add to the segregation of the sexes?
how do new ideas or inventions end up spreading?
The Neolithic Age and the advent of farming meant a division of labor. The women stayed closer to the hearth and tended the crops while the men hunted and/or tended the animals.
http://www.archaeolink.co.uk/Neolithic-Age.html
New ideas and inventions spread by trade and people traveling far from their own villages.