“It wasn't until the 1920s that a bare majority of children grew up in families where the father's labor purchased the family's provisions, while their mother did unpaid child care, elder care, and housework.The Great Depression and World War II disrupted this family form, but it roared back in the 1950s, when the percentage of wives and mothers who were supported entirely by their husbands' wages reached a high that has never been equaled, before or since.”