"Birth of a Nation", for instance, had a huge impact all across North America -- but nobody is around anymore to cite it That's an odd choice of counterexample

"Birth of a Nation", for instance, had a huge impact all across North America -- but nobody is around anymore to cite it That's an odd choice of counterexample, since it ranks pretty highly in this list, so apparently is actually cited a lot on Wikipedia. It's the "most influential" pick for 1915 in the year-by-year list (http://blog.argteam.com/coding/a-history-of-film-in-wikipedia/ http://blog.argteam.com/coding/a-history-of-film-in-wikipedi...), and is #16 of all time in the all-time list (http://blog.argteam.com/golang/the-top-25-movies-of-all-time-chosen-by-an-algorithm/ http://blog.argteam.com/golang/the-top-25-movies-of-all-time...).