"SOMETHING happened to horror movies as the 1960s bled into the ’70s. The supernatural element largely disappeared, to be replaced by more immediate, worldly horrors. Ghosts and vampires no longer seemed quite as frightening when compared to the images of carnage and chaos that began to appear on American television screens"

Read the NY times article by
By DAVE KEHR

http://www.nytimes.com/2009/10/25/movies/homevideo/25kehr.html?ref=movies