After reading the posts here, I have to give credit to Halloween for starting the slasher boom. The first set of slashers to be relesed soon thereafter all had that holiday angle to them, although I wouldn't really call Friday the 13th a holiday, but a themed day nontheless. Slasher films exploded after Halloween and marched right on into the 1980's with fervor. I can't imagine that many of the films that followed would have been thought of, much less made if it wasn't for Halloween. BTW, for anyone to refer to Halloween as not being an important or influential film in the horror genre..well all I can say to you is BULLSHIT!!!