Mostly because we learned the rudiment laws of wisdom at about the age of five.
So what laws did we learn?
The need of : 1 shelter 2 food 3 companionship and how to attract those needs to our life.
That did require loving parents,and a basic social life with some education.The known statement "It takes a village to raise a child."
So what happened? Well,most cultures,countries,lands and people got side tracked, duped,or just enslaved. Mentally and some times physically.By whom? Any one more interested in greed,anger,and stupidity,sound simple,well it is.The village forgot what makes a village live in harmony,with integrity!
How to raise a child? It's very much like following nature,and how it grows,and survives. Especially mammals taking under consideration their environment and history of survival.
Well slinky the Caterpillars ultimate goal the butterfly is a good learning example for children and adults.