Brute Force (also known as Primitive Man) is a 1914 short silent drama film directed by D. W. Griffith, and starring Robert Harron and Mae Marsh. The film was shot in Chatsworth Park, Chatsworth, Los Angeles, California. It is a story of cavemen and dinosaurs, and perhaps the first live-action dinosaur film.^[1] It is a sequel to Griffith's earlier film, Man's Genesis (1912).

• Robert Harron as Harry Faulkner (Prologue) / Weakhands (The Old Days)
• Mae Marsh as Lillywhite
• William J. Butler as Priscilla's Father (Prologue)
• Wilfred Lucas as Brute Force
• Edwin Curglot as Caveman
• Alfred Paget as In Club (Prologue) / Tribesman (The Old Days)
• Jennie Lee as Cavewoman

Rest of cast listed alphabetically:

• Edwin August
• Lionel Barrymore
• Harry Carey as In Womanless Tribe (The Old Days)
• John T. Dillon as In Club (Prologue)
• Frank Evans as In Club (Prologue) / Tribesman (The Old Days)
• Harry Hyde as In Club (Prologue)
• J. Jiquel Lanoe as In Club (Prologue) / Tribesman (The Old Days)
• Elmo Lincoln as In Club (Prologue) / Tribesman (The Old Days)
• Charles Hill Mailes as Valet (Prologue) / Tribesman (The Old Days)
• Joseph McDermott as In Club (Prologue) / Tribesman (The Old Days)
• W. C. Robinson as Valet (Prologue) / Tribesman (The Old Days)
• George Siegmann (unconfirmed)
• Blanche Sweet (unconfirmed)
• Kate Toncray as Tribeswoman (The Old Days)

• List of films featuring dinosaurs
• D. W. Griffith filmography
• Harry Carey filmography
• Lionel Barrymore filmography
• Blanche Sweet filmography

• Brute Force at IMDb