I think the artificial extension of childhood is caused by the rapid increase in complexity of modern society, while our biological makeup is pretty much the sa

I think the artificial extension of childhood is caused by the rapid increase in complexity of modern society, while our biological makeup is pretty much the same as 10.000 years ago. To hold an avarage job and participate in society as an informed citizen you seem to need at least ~20 years of education in western economies. We can't just go around by our instincts like animals any more without getting in trouble, I think that is what caused the extension of childhood.