"Women well understood how to restrict birth through timing of sexual intercourse, herbs and abortifacients. I suspect the focus on men's control of women as the means of reproduction came later, in the last five percent or so of human history, with the idea of children as property and labor. One needed to have as many as possible, never mind about women's health or mobility or brainpower. Women's freedom was restricted in order to make sure of the paternity and ownership of children."