The labor of a woman, who cooks for her husband, who is making tires in the Firestone plant in Southgate, California, is essentially as much a part of the production of automobile tires as the cooks and waitresses in the cafes where Firestone workers eat. And all the wives of all the Firestone workers, by the necessary social labor they perform in the home, have a part in the production of Firestone Tires, and their labor is as inseparably knit into those tires as is the labor of their husbands.