Historians once assumed that when childhood mortality was high, people must not have loved their children very much; it would have been too painful. Research has since proved that assumption wrong.
The very first television ad targeted to women was produced by the Eisenhower-Nixon campaign in 1956. It includes footage of a woman supervising her children doing their homework at the kitchen table.
An ordinary life used to look something like this: born into a growing family, you help rear your siblings, have the first of your own half-dozen or even dozen children soon after you're grown, and die before your youngest has left home.