In today's world, it is strange to think that children were replaceable. If you ask any parent if they would consider having another child if they suddenly lost theirs, the struggle of emotions on their face would be difficult to watch.
And yet, there was a period of time when children were not considered as valuable as they are today. This post which touches on Pricing the Priceless Child by sociologist Viviana Zelizer explores the way we value our children and the evolution of the revered child.
I've written before about the current cost of raising a child, but cost and value aren't the same thing to parents. The way my son greets me when I pick him up for school or the way he smiles at me when he first wakes up in the morning with his bed head and blanket wrapped around him. Those are the priceless moments. The ones that aren't replaceable.