On our post about the 00s (see, when you’re writing, you don’t have to figure out what to call them), Stupendousness, who had one heck of a decade, writes this from her 27-year-old perspective:

I feel like a very different person from my 17-year-old self. I believe part of that is clearly due to the continuing maturation of my brain, which is just biological. The way my brain works has changed enough to affect my personality to an extent, and some of that has been involuntary, but I’ve also consciously changed many of my thought-patterns. Or tried. I am much less cynical these days, for example.

Yes. The brain develops a lot between the teenage years and 25 or so. Some of the mistakes we make in our teens and early 20s are the result of lack of experience — but some are due to the simple fact that your brain works about as well as the beater cars most of us were driving at that age. It’ll get you where you want to go most of the time, but it’s not always reliable. Your capacity for executive functioning kind of fades in and out for a while like an AM oldies station two towns over.

I was aware of that myself, in my teens and 20s. I didn’t let myself have a credit card until I was 25. But I sure didn’t know the biology of it, and I bet that, Stupendousness, made your experience rather different. How did you learn about brain development? And it makes me wonder what it would be like if this kind of thing were taught in schools more. It seems (and please, if anyone knows different, tell me) that schools offer a lot of coaching (or at least nagging) about good study and health habits, deferral of gratification, career planning, and the like, without ever explaining to students why it’s going to be hard for them to learn these skills, and why sometimes they’ll find themselves doing exactly the thing they know they shouldn’t. I don’t think students would take this as an excuse to skive off (“Dude! Give me a break! My brain’s not finished yet!”). I think the more dutiful ones — and most young folks do want to be responsible — will give themselves a much-needed break from time to time. And I think it makes the process of learning boring, unfun things more interesting, because you would know you are actually programming your brain.

(Please don’t misunderstand me — I’m not saying that once you’re 25, you’ll never make a regrettable impulse buy, impolitic comment at work, or pitcher of grain-alcohol punch again. We all do things we know we shouldn’t, take short-term pleasures over long-term gain. But certain kinds of judgment really are, biologically, more difficult to sustain before the mid-20s.)