When one pushes the age of real maturity in the mid-30's and early 40's, one can expect the growth at the teen years to be retarded I like to compare it to the college students of my era (1960's) to today's college student. We protested a war, they protest having to pay off their loans. Kinda makes one wonder how far
In a lot of countries the conference of adulthood is in the early teens. I can't imagine our 13 year olds going out and killing a lion to prove his manhood or a woman in her early teens giving birth to a child. There are cultures out there that think this as normal. I guess the big move to adulthood is moving out of your parents basement sometime after you turn 30.
When I was a child, my first babysitters were 12 and 13 year olds. Now 12 and 13 year olds need babysitters. Not a good trend.