Rebel Without a Cause (1955)
Roughly born between 1927 and 1942, too young to fight for a cause, they got to become rebels without one... being fans of Elvis, James Dean and Levi's Jeans.
Musically, the generation wasn't that silent, they rocked... and rolled too. The wild ones got wiser with age, and embraced during adulthood less confused morals and more idealistic attitudes, among them Civil Rights movements and Women's rights.
By the way, I didn't overlook the generation that fought during WW2 (or most endured its hardship), but are there really IMDb users over 90 out there?