I’m from Generation X, and I really coulda sworn the '90s was our decade. But I keep seeing blogs, posts, and email forwards chock full of nostalgia for that decade, but not oriented around the big news events of the time (especially not of the early years), or around the kind of popular culture teens and twentysomethings at the time were into, but mostly concerning grade school fads and Nickelodeon or Disney Channel TV shows. WTF?
I mean, everyone who is alive during an era is entitled to be nostalgic for it. But this strikes me as similar to if The Wonder Years was representative of the dominant '60s nostalgia rather than being an interesting example of an atypical POV.
So what age group should “own” a decade in this sense? I submit that you should be able to remember it from beginning to end, including the major news events and big pop culture events (most popular songs, movies, TV shows) of each year. And there should be no previous decade about which this is true for you. Preferably you experienced major “coming of age” milestones during the decade: starting high school, getting a driver’s license, getting the right to vote, graduating high school, becoming old enough to legally drink, graduating college. Still being in your twenties by the time the decade ends seems to make sense too.
So by this metric, the “ideal” birth year for someone to claim the '90s as “their” decade is 1976, solidly GenX. Expand a few years in each direction, and everyone born somewhere in the '70s should be set. And at the time, those were the people really driving popular culture (along with, in the early '90s especially, some older GenXers from the late '60s). But as I say, those are not the people I see reminiscing now, who are IMHO trivialising the memory of a pretty interesting era and presenting it as something rather banal.
My theory for why this is happening (when it didn’t to, say, the Sixties) is that it is because there are just not nearly as many Americans born in the '70s as in any other decade (unless you go back to the Depression era, but I mean non-elderly Americans). So despite having a brief heyday when they were teens and twentysomethings, they are being swamped out now.