Alfred Hitchcock's Psycho was the subject of controversy when it opened in 1960. Though technically a thriller, it redefined the horror genre in one fell swoop and created the template for the slasher movies of the 1970s and 80s. Today, its influence can be seen in horror films like X and Pearl, and in many ways it still defines the subversive potential of the genre.
Source：https://www.cbr.com/psycho-1960-controversial-alfred-hitchcock/
