1970s counterculture

His films like 'One Flew Over the Cuckoo's Nest' and 'Hair' directly capture the clash between individual rebellion and institutional authority that defined 1970s counterculture.

Through 'The Godfather' series and 'Apocalypse Now,' he explored corruption, power, and the disillusionment of American institutions central to counterculture ideology.

His gritty 1970s films like 'Taxi Driver' and 'Mean Streets' authentically depicted urban alienation, moral ambiguity, and the darker side of American rebellion.