We tend to look back on the past and note a few differences here and there, and then our minds fill in all the blanks with similarities to the present. Pascal-Emmanuel Gobry takes a small step to correct this enormous blind spot we all have by writing a bit about how Christianity invented children, and how modern humanity takes the worth of a child for granted. (Well, except for abortion.)
We have forgotten just how deep a cultural revolution Christianity wrought. In fact, we forget about it precisely because of how deep it was: There are many ideas that we simply take for granted as natural and obvious, when in fact they didn't exist until the arrival of Christianity changed things completely. Take, for instance, the idea of children.
Today, it is simply taken for granted that the innocence and vulnerability of children makes them beings of particular value, and entitled to particular care. We also romanticize children -- their beauty, their joy, their liveliness. Our culture encourages us to let ourselves fall prey to our gooey feelings whenever we look at baby pictures. What could be more natural?
In fact, this view of children is a historical oddity. If you disagree, just go back to the view of children that prevailed in Europe's ancient pagan world.