I've always approached the issue from my background in artistic expression (music in particular). There's a quote I once heard, though I can't remember the attribution, that says something like: The great banquet of music ended in the early 1900's (post-Romanticism). Now in our age, we are the mice after the banquet, making what we can of the leftover crumbs.
Reminds me of the very first Dr. Who episode from the 60's. They tune in a radio transmission of the Beatles, and the girl traveling with the Doctor squees "Oooh, I just
looooove classical music!"
Remember, "contributions" are judged by historians! Post boomers ain't history yet.
And the census has it wrong, the baby boom ended in 1960. In that year, birth
rates returned to their pre-war level. The population was so huge by then, though, that the
numbers of births were still quite high. Also, by that time, early boomers were having their own kids!