Widely regarded as the "grandfather" of slasher films, its DNA can be found in nearly every major horror franchise that followed. A Bay of Blood (1971)
A Bay of Blood (1971), originally titled Ecologia del delitto (Ecology of Crime), is a landmark Italian horror film directed by Mario Bava that serves as the definitive bridge between the stylish mystery and the modern slasher subgenre. Core Premise & Themes
Uniquely for the genre, the film features no clear hero; nearly every character is driven by avarice, leading to a dark, ironic conclusion that director Joe Dante famously compared to the ending of Citizen Kane .