> I agree it sounds great to let your kids roam free as we did, but I think in practice the environment has changed in ways that make it difficult
I agree, both with this and the premise that overprotective parenting is a real phenomenon. You can't place all of the blame on the parents for their increased vigilance because the environment of growing up has literally changed.
Like many of you, when I was young, I played all over my neighbourhood with other kids my age, completely unsupervised. Free to wander quite far from my home with the understanding that I would be home for supper. However, I grew up in a small town (pop. ~20k).
Today, most people live in cities, and many in large ones (us included). When my kids are older, I will do my best to give them freedom to play, but there are just some realities today that are different from when I was younger. I remember reading somewhere that there are roughly 3x the amount of vehicles on the road as there were in the 80s (when I was growing up). My biggest safety fear for my kids is traffic. We live in a city. There are a lot of parks around, but getting to and from places involves navigating traffic and a lot of it. I'll do my best to educate them and give them trust to do so, but you can't help but be a bit concerned. We all know you can be involved in a traffic accident these days through no fault of your own.
To clarify: I'm not saying that the world is actually more dangerous for kids today than it was a generation ago, but I think for many parents it's not difficult to see how they could have that perception (true or not) and thus parent in a more protective way. Not only has the world changed, but so has the beholder (from carefree child to responsible parent).