1. Chinatown (1974)
If Los Angeles is built on beautiful illusions (some might say lies), then call it a cosmic coincidence that the high point of intelligent Hollywood filmmaking—Roman Polanski’s staggeringly great neonoir—arrived in the service of exposing the city’s buried sins. Chinatown is as ingenious as screenwriting gets: Robert Towne’s 1930s detective tale seamlessly blends glamour and action with then-current paranoia, the Nixonian moment when “follow the money” was the phrase on all lips. In the film’s case, it’s “follow the water,” diverted from thirsty orange groves in the Valley to future suburban tracts. The crime is colossal in scope and based on true events; rakish detective Jack Nicholson (never better) is quickly in over his head. But no mere period piece—even one with luscious Faye Dunaway—could ever top our list on historicity alone. The lasting beauty of this cynical movie is obvious to any screenwriter who aspires to say something profound about their town, and to any Angeleno who wants to believe the truth is out there.—Joshua Rothkopf