Rosemary's Baby influenced Hereditary

Ari Aster has named it among the films he was working from, and the structure is the same trick: a family tragedy that the audience explains psychologically for most of the running time, and a final scene that says the coven was real and organised all of it. Both films spend their length letting you believe the woman at the centre is unwell, then reveal she was the only one paying attention. Both end with a coronation rather than an escape.