I like this from Malcolm Gladwell on the "limits of big data." And the difference between "developmental" and "generational" changes in people's behavior.
According to Gladwell:
Horror Movies are "developmental." Teens watch horror movies as a rite of passage. Horror movies change nothing. Destroy all the horror movies and "nothing would change." Horror movies didn't change the culture at large.
Alternatively Rap Music is "generational." Rap music changed the culture at large from fashion, music, and race relations.
Hunh!