His operatic Westerns explore vengeance as a corrupting force that destroys families across generations, most powerfully in 'Once Upon a Time in the West.'

His films like 'Oldboy' and 'The Handmaiden' delve into intricate cycles of familial betrayal and revenge that blur moral boundaries.

The 'Godfather' trilogy is the definitive exploration of how family honor and vendetta intertwine to define identity and legacy across generations.