The Birth of a Nation (1915)

The Birth of a Nation (1915) is the most consequential film ever made for its harmful real-world impact, directly inspiring the revival of the Ku Klux Klan, which grew to 4 million members by the 1920s. D.W. Griffith's technical masterpiece introduced modern film grammar — close-ups, parallel editing, and epic battle sequences — but its racist propaganda depicted Black people (played by white actors in blackface) as savage threats. Concrete data point: the film earned over $18 million in its initial release, a record that no other film on this list achieved. This success dwarfs Salò's modest $200,000, illustrating how popular appeal amplifies dangerous ideologies. The debate about separating art from its harmful context remains unresolved, making The Birth of a Nation a permanent benchmark for the moral responsibility of cinema.