Teaching the kids to make quick comparisons between past and present society, especially for questions in the context of "today's world". Here's a look at how parenting trends have changed over time. Comments at the bottom of the article are interesting as well.
What do I remember of my teenage years? Strict discipline at home, but near complete freedom to go gallivanting outside the house without overt adult supervision. As long as I let the folks know where I was and when I was expecting to return home, I was pretty much on my own. In case you are wondering, I never abused the privilege. Trust was a precious commodity to earn and keep back in the day.
That's kinda' like what the article describes about parenting in the '50s. I'm not that old, of course, but maybe back then it took about 30 years for the parenting manuals of the '50s to get here where my folks could read and apply their wisdom on their beloved firstborn.