Here’s a research finding that sounds backwards until it suddenly doesn’t.
When scientists looked at adults’ fear of heights, they found something strange: people who had actually fallen from heights as children — real falls, injury-grade falls — grew up less afraid of heights than people who’d never fallen at all.
Not more afraid. Less.
Sit with that for a second, because it’s the key to an entire generation. The kids of the 1960s and 70s fell out of a lot of trees. They also got lost, got scraped, got into it with other kids, and got bored beyond all modern comprehension — while the adults in their lives paid a level of attention that today would prompt a wellness check. And according to a growing pile of psychology, all that unsupervised scuffing wasn’t the price of their childhood.
It was the treatment.
Nature installed the fears. Childhood was supposed to remove them.
To see why, you need one idea from evolutionary psychology, and it reframes everything about how kids work.
Children arrive pre-loaded with fears — heights, strangers, being separated from their parents. These aren’t glitches; they’re factory settings, protecting small humans from situations they’re not yet mature enough to handle. But here’s the elegant part, laid out in a now-classic paper by researchers Ellen Sandseter and Leif Kennair: those fears are supposed to be temporary. And the uninstall program is play — specifically the scary kind.
Watch what children do when nobody stops them: they climb too high, ride too fast, wrestle, wander off, poke at exactly the things that frighten them — grinning the whole time. (“It tickles in my tummy,” as kids in Sandseter’s studies put it.) That’s not recklessness. It’s the anti-fear program running exactly as designed: thrilling, self-dosed exposure to each factory-installed fear, repeated until the fear is mastered and falls away. The researchers call the effect anti-phobic — risky play is how children inoculate themselves against their own anxieties, including, remarkably, separation anxiety: kids who got to wander off and feel the thrill of almost being lost came out the other side less afraid of being on their own.
Every kid ever born ships with the program. The question is whether the environment lets it run.
The 60s and 70s ran the program at full dose — by accident
Now picture the program’s ideal operating conditions: hours of unsupervised time, interesting hazards within biking distance, and adults too busy to intervene.
That’s just a description of 1971.
Nobody designed it. Parents of that era weren’t administering exposure therapy; they were smoking in the kitchen while their children self-administered it — trees, creeks, rooftops, rope swings, fistfights, five-mile wanders, all of it dosed by the only party qualified to dose it: the child’s own nervous system, which reliably seeks the edge of what it can handle and not an inch past. (One lovely detail from the research: when scientists asked preschools about risky play, “the danger of getting lost” was rated as risky only by the children themselves — the adults hadn’t even noticed it was part of the curriculum.)
Developmental psychologists have an old name for what all those survivable scares add up to — the steeling effect: stress in manageable doses doesn’t damage a developing system, it calibrates it, the way vaccines brief an immune system. A childhood with a thousand small, self-chosen frights is a childhood spent building the master skill underneath all emotional durability: the bone-deep knowledge that fear spikes, and peaks, and passes, and you’re still fine. The 70s kid didn’t learn that from a worksheet on feelings. They learned it forty feet up a pine tree, gripping bark, deciding on the way down that they were the kind of person who handles things.
Then we fixed everything — and the program stopped running
What happened next wasn’t villainy. It was love, plus liability insurance.
Over a few decades, nearly every station of the old accidental gymnasium was closed for safety: the heights lowered, the speeds capped, the wandering ended, the rough-and-tumble broken up on contact, the boredom abolished by glowing rectangles, the unsupervised hour essentially outlawed by custom. Each fix was individually reasonable. Collectively, they switched off the anti-fear program — and the researchers saw the consequence coming a decade before it arrived, warning that if children are hindered from risky play, we should expect rising anxiety and psychopathology in society as the natural fears that childhood was supposed to dissolve… simply never dissolve.
Writers like Jonathan Haidt have since given the underlying principle a name borrowed from engineering: kids aren’t fragile, and they aren’t merely resilient — they’re antifragile, systems that require stressors to grow strong, the way bones need load and immune systems need germs. Protect an antifragile system from all challenge and you don’t preserve it. You weaken it, gently, with the best intentions, one removed hazard at a time.
Which is the whole strange verdict on the benign-neglect generation: they weren’t raised better. They were raised less — and “less,” it turns out, was carrying the load.
What we can’t say — and what we can
Honesty requires a beat here: nobody sane wants the full 1971 package back. The era’s neglect wasn’t all benign; the injuries were real, the lead paint was real, and some kids fell through cracks no one was watching. The finding isn’t that indifference is a parenting philosophy.
It’s narrower and more useful: buried inside that indifference was one active ingredient — unsupervised, self-dosed challenge — and it can be separated from the genuine harms and reintroduced deliberately. The Norwegians already do it; their preschools build risky play into the day on purpose, hills and tools and trees included, precisely because the research is theirs.
For everyone else, it starts smaller. The climb not interrupted. The squabble left to resolve itself for five more minutes. The walk to the store, solo, at an age that makes you slightly uncomfortable — because your slight discomfort is the tell that the program is running. The child’s nervous system still knows the dose. It’s been waiting the whole time for someone to reopen the clinic.
The tree is still out there. The kid still wants to climb it.
The only thing the last forty years actually removed — was our willingness to watch from the kitchen window, and let it tickle in their tummy.