I think people did understand this until the last century or two. I remember reading a book about Abraham Lincoln several years ago, and it talked about the clothes he wore (which were baby clothes) until the age of 5 because 0-5yos were considered babies still. And think about how in the "old days" children didn't go to school until age 8 or so....like in the Little House on the Prairie books. As with most of the old wisdom, it has been forgotten in our modern age of "enlightment".
I had a PM conversation with Crystal a few years ago about the Age of Accountability being 21 and it was totally eye-opening to me, and made so much sense. And child development evidence does back this up. Why are we (our society) always in such a rush for these little children to grow up? It makes me feel more valuable and necessary as a mom to remember how much they need patience and understanding and my guidance for YEARS.
Thanks, Heather, for posting this. It is a great reminder!