It’s difficult to make conclusions about this, because most historical cultures made fairly little effort to support their conventions at all. However, it’s certainly been my impression that a lot more cultures were OK with casual infanticide than casual murder. This suggests strongly to me that the view of newborns as people is not universal.
Cultures are often fine with killing wives and children too, if they get too far out of line. They are yours after all.
Cultures are often fine with killing wives and children too, if they get too far out of line. They are yours after all.